{"id":1142,"date":"2019-08-01T10:57:48","date_gmt":"2019-08-01T17:57:48","guid":{"rendered":"https:\/\/www.logiwa.com\/?p=1142"},"modified":"2025-05-02T05:12:25","modified_gmt":"2025-05-02T12:12:25","slug":"picking-path-optimization-algorithm","status":"publish","type":"post","link":"https:\/\/www.logiwa.com\/blog\/picking-path-optimization-algorithm","title":{"rendered":"Warehouse Optimization &#8211; Algorithms For Picking Path Optimization"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;section&#8221; _builder_version=&#8221;4.16&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_row admin_label=&#8221;row&#8221; _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; width=&#8221;auto&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_text ul_item_indent=&#8221;30px&#8221; admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.18.0&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<\/p>\n<p>In this article, we&#8217;ll explore the intriguing world of warehouse optimization, with a particular emphasis on algorithms used for picking path optimization. You&#8217;ll gain an understanding of how today&#8217;s competitive warehouses have evolved their practices, with a spotlight on how optimization methods can reduce labor efforts, increase efficiency, and improve accuracy. From unpacking complex terms like &#8216;heuristics&#8217; and &#8216;algorithms&#8217; to diving into practical applications for the warehouse environment, this piece is your guide to mastering warehouse optimization.<\/p>\n<p><strong>Key Takeaways:<\/strong><\/p>\n<ul>\n<li>Picking path optimization is a critical aspect of warehouse management, with picking accounting for over 50% of a warehouse&#8217;s labor efforts. Efficiently optimizing this process can significantly boost warehouse productivity.<\/li>\n<li>Heuristics and algorithms are essential tools in the optimization process. While heuristics are practical, &#8216;good enough&#8217; solutions for complex problems, algorithms provide step-by-step solutions to specific problems.<\/li>\n<li>Two core algorithmic problems underpin the picking path optimization process: The Traveling Salesman Problem and the Shortest Path Problem. Several algorithms, like Dijkstra\u2019s algorithm and the Ant Colony Optimization algorithm, have been developed to tackle these issues.<\/li>\n<li>Automated applications exist to run these algorithms for picking path optimization, although the selected tools must align with the warehouse&#8217;s specific optimization goals.<\/li>\n<li>Warehouse management software, such as Logiwa WMS, can significantly aid in the process of pick path optimization, improving overall warehouse efficiency.<\/li>\n<\/ul>\n<p>Managing and optimizing a warehouse in the 21st century is a whole new ballgame.<br \/>In the past, it was enough to keep a clean, well-organized facility and schedule a decent number of pickers.<\/p>\n<p><!--more--><\/p>\n<p>Now, warehouses stay competitive by optimizing every possible area of work\u2014from picking to packing to shipping. With new warehouses cropping up every day, and customer demand for speedy deliveries rising, order fulfillment centers don\u2019t have the option of phoning it in. They must analyze their warehouses from top to bottom to look for inefficiencies and nip them in the bud.<\/p>\n<p>One warehouse process that\u2019s ripe for warehouse optimization is the pick path. According to some estimates, picking takes up over 50% of a warehouse\u2019s labor efforts. This isn\u2019t surprising considering that, despite <a href=\"\/blog\/warehouse-technology-trends\" rel=\" noopener\">warehouse technological advancements<\/a> in areas like automated storage and retrieval systems, picking is still a largely human-led process.<\/p>\n<p>Nevertheless, it\u2019s possible to further optimize picking and, more specifically, the pick path. Oftentimes, the biggest cause of inefficiency during the picking process is <a href=\"\/blog\/motion-waste\" rel=\" noopener\">motion waste<\/a> &#8211; the unnecessary movement that makes a given task take longer than it should.<\/p>\n<p>Walking path optimization\u2014or picking path optimization, depending on who you talk to\u2014is the process of finding the fastest way to navigate the warehouse in order to pick products quickly, accurately, and efficiently by using various picking methods such as <a href=\"\/blog\/warehouse-wave-picking\" rel=\" noopener\">wave picking<\/a>, <a href=\"\/blog\/zone-picking-pick-and-pass\" rel=\" noopener\">zone picking<\/a>.<\/p>\n<p><!-- Table of Contents --><\/p>\n<div class=\"blog-toc\">\n<p>In this article, we will walk you through some methods for walking path optimization for pickers:<\/p>\n<ol>\n<li><a href=\"#1\" rel=\"noopener\">What Is A Heuristic and How Does It Apply To Walking Path Optimization for Pickers?<\/a><\/li>\n<li><a href=\"#2\" rel=\"noopener\">What Is An Algorithm and How Does It Apply To Walking Path Optimization?<\/a><\/li>\n<li><a href=\"#3\" rel=\"noopener\">The Two Problems at the Center of the Picking Path Optimization Process<\/a><\/li>\n<li><a href=\"#4\" rel=\"noopener\">Which Algorithms Are Available for Walking Pick Path Optimization?<\/a><\/li>\n<li><a href=\"#5\" rel=\"noopener\">Can I Run These Algorithms Automatically For My Picking Path Optimization?<\/a><\/li>\n<\/ol>\n<\/div>\n<p><!-- In-Page Optin Box --> <!-- In-Page Optin Box --><\/p>\n<p class=\"in-content-optin\"><strong>BONUS:<\/strong> Before you go any further, download our <a href=\"\/resources\/guides\/order-picking-guide\" target=\"_blank\" rel=\"noopener\">Order Picking Strategies guide<\/a> where we compare order-based, cluster, and batch-picking methods to see which method leads to the highest productivity.<\/p>\n<h2 id=\"1\"><span style=\"font-size: medium;\">What Is A Heuristic and How Does It Apply To Walking Route Optimization for Pickers?<\/span><\/h2>\n<p>If you research algorithms to optimize any area of warehouse management, you\u2019ll likely hear the word \u201cheuristic\u201d a lot. It\u2019s one of those words tossed in to confuse readers into throwing their hands up in the air and giving up on the entire endeavor.<\/p>\n<blockquote>\n<p>In the context of warehouse optimization, a heuristic or heuristic technique is a method of accomplishing a specific goal that is suitable for practical purposes, but isn\u2019t guaranteed to be perfect.<\/p>\n<\/blockquote>\n<p>For example, when you apply a rule of thumb or make an educated guess, you\u2019re using a heuristic technique.<\/p>\n<p>When talking about warehouse optimization, researchers come up with processes and algorithms designed to address warehouse inefficiencies without necessarily producing a perfect approach. This is because at the core of many warehouse management problems are difficult math problems that are still being worked out by academics.<\/p>\n<p>If the warehouse industry waited for a perfect solution to every math problem at the foundation of warehouse management problems, (see: bin packing and knapsack problem) we\u2019d be working in very inefficient warehouses for a very long time!<\/p>\n<p>So, whenever you hear someone use the word \u201cheuristic,\u201d remember that they\u2019re just referring to an \u201cokay for now\u201d method. It\u2019s a way of saying the solution isn\u2019t perfect. In fact, you can probably ignore the term altogether whenever you see it.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_2,1_2&#8243; module_class=&#8221;center-vertically&#8221; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#eef1f8&#8243; width=&#8221;100%&#8221; module_alignment=&#8221;center&#8221; custom_margin=&#8221;42px|auto|45px|auto|false|false&#8221; custom_padding=&#8221;30px|40px|30px|40px|false|false&#8221; link_option_url=&#8221;\/resources\/guide\/selecting-the-best-dtc-picking-strategy&#8221; border_radii=&#8221;on|12px|12px|12px|12px&#8221; box_shadow_style=&#8221;preset1&#8243; box_shadow_vertical=&#8221;0px&#8221; box_shadow_blur=&#8221;10px&#8221; box_shadow_color=&#8221;rgba(74,75,109,0.09)&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; disabled_on=&#8221;on|on|on&#8221; disabled=&#8221;on&#8221;][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_image src=&#8221;https:\/\/www.logiwa.com\/wp-content\/uploads\/2022\/03\/DTC-Picking-strategy.jpg&#8221; alt=&#8221;warehouse optimization DTC Picking strategy&#8221; title_text=&#8221;DTC-Picking-strategy&#8221; url=&#8221;https:\/\/www.logiwa.com\/resources\/guides\/selecting-the-best-dtc-picking-strategy&#8221; _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; box_shadow_style=&#8221;preset1&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_image][\/et_pb_column][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_text _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; text_font=&#8221;||||||||&#8221; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;22px&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<b>Cluster Picking vs Smart Picking: <\/b>download the guide to see how selecting the best DTC picking strategy can you time. Up to 50% or more in both picking and packing![\/et_pb_text][et_pb_button button_url=&#8221;https:\/\/www.logiwa.com\/resources\/guides\/selecting-the-best-dtc-picking-strategy&#8221; button_text=&#8221;get the guide&#8221; module_class=&#8221;custom&#8221; _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_button][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; width=&#8221;auto&#8221; custom_margin=&#8221;15px|auto|15px|auto|false|false&#8221; custom_css_main_element=&#8221;.hbspt-form .legal-consent-container a {||    color: white !important;||}&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; global_module=&#8221;26788&#8243; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; use_background_color_gradient=&#8221;on&#8221; background_color_gradient_stops=&#8221;#481a96 0%|#200741 100%&#8221; custom_padding=&#8221;15px|35px|15px|35px|true|true&#8221; border_radii=&#8221;on|10px|10px|10px|10px&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_text _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; header_3_text_color=&#8221;#ffffff&#8221; header_3_font_size=&#8221;30px&#8221; header_3_font_size_tablet=&#8221;30px&#8221; header_3_font_size_phone=&#8221;20px&#8221; header_3_font_size_last_edited=&#8221;on|phone&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; disabled_on=&#8221;off|off|off&#8221;]<\/p>\n<h3 style=\"text-align: center;\">Request a free demo to learn more about Logiwa WMS.<\/h3>\n<p>[\/et_pb_text][et_pb_code _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; text_orientation=&#8221;center&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<script charset=\"utf-8\" type=\"text\/javascript\" src=\"\/\/js.hsforms.net\/forms\/embed\/v2.js\"><\/script><!-- [et_pb_line_break_holder] --><script><!-- [et_pb_line_break_holder] -->  hbspt.forms.create({<!-- [et_pb_line_break_holder] -->    portalId: \"3469233\",<!-- [et_pb_line_break_holder] -->    formId: \"350e3ad2-eb09-46b1-9079-3f728ec2c0ea\",<!-- [et_pb_line_break_holder] -->    region: \"na1\"<!-- [et_pb_line_break_holder] -->  });<!-- [et_pb_line_break_holder] --><\/script>[\/et_pb_code][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; width=&#8221;auto&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_text _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<\/p>\n<h2 id=\"2\">What Is An Algorithm and How Does It Apply To Walking Path Optimization?<\/h2>\n<p>\u201cAlgorithm\u201d is another word that\u2019ll pop up often when you read about topics like picking path warehouse optimization. It sounds complicated, but it\u2019s not.<\/p>\n<p>An algorithm is just a sequenced list of instructions. When you bake a cake, you use a recipe and that recipe can be considered an algorithm. If you were to build a machine that created a cake for you from scratch, and all you needed to do was upload the recipe, you\u2019d essentially be feeding your \u201ccake-making machine\u201d an algorithm that it would use to make a dessert.<\/p>\n<p>The algorithm would let the machine know that it needs to crack the eggs before putting them in the bowl.<\/p>\n<p>In warehouse optimization scenarios, there are algorithms for any number of processes. In the case of walking path optimization, a warehouse manager may have an algorithm where he or she can plug in certain variables and obtain an optimized pick path.<\/p>\n<p class=\"in-content-optin\"><strong>Order picking accounts for 60% of your warehouse operational costs.<\/strong>\u00a0Make sure you\u2019re using the most cost-effective order picking strategy by reading our detailed guide where we <a href=\"\/resources\/guides\/order-picking-guide\" target=\"_blank\" rel=\"noopener\">compare the 3 most common order picking methods.<\/a><\/p>\n<h2 id=\"3\">The Two Problems at the Center of the Picking Path Optimization Process<\/h2>\n<p>Remember when we mentioned that larger math problems sit at the center of many warehouse optimization problems? The same idea applies to the walking path optimization process. In this area, we\u2019re faced with two big algorithmic problems:<\/p>\n<ul>\n<li>The Traveling Salesman Problem<\/li>\n<li>The Shortest Path Problem<\/li>\n<\/ul>\n<p>Both problems are tricky algorithmic problems to solve when faced with a large data collection set. This is why industry professionals devise \u201cheuristics\u201d to provide workable solutions in a warehouse productivity context.<\/p>\n<h4><span style=\"font-size: medium;\">The Traveling Salesman Problem<\/span><\/h4>\n<p>While the traveling salesman job may be dying out, the traveling salesman problem is still alive and kicking.<\/p>\n<p>Suppose you\u2019re a traveling salesman with several locations to visit. How do you take the shortest (quickest) route to visit all of these destinations once and ultimately wind up back in your starting city?<\/p>\n<p>Now, you could figure this out through trial and error, which is known as the \u201cbrute force\u201d method. If you\u2019re only hitting four or five locations, you map out every possible route and pick the shortest route.<\/p>\n<p>But what if you\u2019re hitting up dozens of locations spread out across a large geography? In the time it takes you to map out every possible route and pick the best one, you could\u2019ve completed your trip.<\/p>\n<p>Normally, this is where algorithms come in to make life easier. You\u2019ve got a problem. You plug in the variables. The algorithm does the time-intensive number-crunching quickly and boom, you\u2019ve got an answer.<\/p>\n<p>But the traveling salesman problem is classified as an NP-hard problem, which means it\u2019s rather difficult to solve in a reasonable amount of time. This is why \u201cheuristics\u201d exist. They\u2019re our \u201cgood enough\u201d solutions to keep things moving.<\/p>\n<h4><span style=\"font-size: medium;\">The Shortest Path Problem<\/span><\/h4>\n<p>As the name implies, the shortest path problem is about finding the shortest path between two points, also known as \u201cnodes\u201d or \u201cvertices\u201d as they\u2019re referred to in graph theory. Connecting these vertices are lines or \u201cedges.\u201d<\/p>\n<p>The shortest path problem finds the shortest path between two nodes in a weighted graph\u2014a graph where the edges (the lines between two points) have a specific value. That value could be the distance or even the cost.<\/p>\n<p>In other words, a weighted graph represents the labor cost associated with moving through your warehouse, and the shortest path problem is about finding the quickest, cheapest way to move from one point to the next.<\/p>\n<p>When the values are positive, the shortest path problem is considered solvable in a reasonable amount of time, unlike the traveling salesman problem. Since most warehouse managers aren\u2019t in the habit of labeling graphs with negative dollar values or negative measurements, that\u2019s good news.<\/p>\n<p>In fact, a number of algorithms exist for tackling the shortest path problem.[\/et_pb_text][et_pb_image src=&#8221;https:\/\/www.logiwa.com\/wp-content\/uploads\/2024\/01\/blog-power-of-ai-job-optimization-1-1.png&#8221; alt=&#8221;blog &#8211; power of ai job optimization&#8221; title_text=&#8221;blog &#8211; power of ai job optimization&#8221; url=&#8221;https:\/\/www.logiwa.com\/blog\/the-power-of-ai-job-optimization&#8221; _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; border_radii=&#8221;on|20px|20px|20px|20px&#8221; box_shadow_style=&#8221;preset1&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<\/p>\n<h2 id=\"4\">Which Algorithms Are Available for Walking Pick Path Optimization?<\/h2>\n<p>As you can probably tell by now, <a href=\"https:\/\/www.semanticscholar.org\/paper\/Warehouse-Pick-Path-Optimization-Algorithm-Analysis-Key-Dasgupta\/38a7c23700ed6c5c2115a44d5574987e3ee59a88?p2df\" target=\"_blank\" rel=\"nofollow noopener\">walking path optimization requires warehouses to address both the traveling salesman problem and the shortest path problem<\/a>.<\/p>\n<ol>\n<li>You must solve the traveling salesman problem for all storage spots in a warehouse. The start and endpoint is the shipping area.<\/li>\n<li>Simultaneously, as you move through the traveling salesman problem while filling the order, you also must address the shortest path problem while moving from a given item location (node or vertices) to all other item locations.<\/li>\n<\/ol>\n<p>In other words, you need to find the shortest point between all the nodes before you\u2019re able to find the shortest path <i>through <\/i>all the nodes.<\/p>\n<p>This is because there\u2019s no guarantee that every node is connected with one edge, which is necessary for a standard approach to the traveling salesman problem. As a result, you must find the shortest distance between each node first.<\/p>\n<p>There are a <a href=\"https:\/\/www.semanticscholar.org\/paper\/Warehouse-Pick-Path-Optimization-Algorithm-Analysis-Key-Dasgupta\/38a7c23700ed6c5c2115a44d5574987e3ee59a88?p2df\" target=\"_blank\" rel=\"nofollow noopener\">number of different algorithms for each problem<\/a>.<\/p>\n<table style=\"width: 100%; border-collapse: collapse; border-color: #30d5c8;\" border=\"1\" cellpadding=\"15px\">\n<tbody>\n<tr>\n<td style=\"width: 46.6667%; border-width: 1px; padding: 15px;\"><strong>Traveling Salesperson Problem<\/strong><\/td>\n<td style=\"width: 53.2367%; border-width: 1px; padding: 15px;\"><strong>Shortest Path Problem<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 46.6667%; border-width: 1px; padding: 15px;\">\n<p><strong>Exhaustive Search Algorithm<\/strong><\/p>\n<p>This approach considers every possible tour path. If the exhaustive search method is completed, it will definitely find the shortest route, but it is highly complex and unviable with a large amount of data.<\/p>\n<p>The exhaustive search method is not considered an efficient algorithm for picking path optimization.<\/p>\n<\/td>\n<td style=\"width: 53.2367%; border-width: 1px; padding: 15px;\">\n<p><strong>Dijkstra\u2019s Algorithm<\/strong><\/p>\n<p>The shortest distance between a select number of starting points and all other vertices is found.<\/p>\n<p>It\u2019s a useful and popular starting point for picking path optimization. As a result, there has been an extensive amount of research on this algorithm resulting in enhancements like:<\/p>\n<ul>\n<li>Subgraph Partitioning<\/li>\n<li>Bidirectional Search<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 46.6667%; border-width: 1px; padding: 15px;\">\n<p><strong>Nearest Neighbor Algorithm<\/strong><\/p>\n<p>This is a straightforward approach in which you start at the point closest to your starting point and continue through your path by moving to the nearest item. Naturally, there\u2019s no guarantee that you\u2019re going to take the best route this way. It just eliminates having to think about the process.<\/p>\n<p>This is not a recommended approach for warehouse picking path optimization.<\/p>\n<\/td>\n<td style=\"width: 53.2367%; border-width: 1px; padding: 15px;\">\n<p><strong>Floyd\u2019s Algorithm<\/strong><\/p>\n<p>The optimal distance between all points is found.<\/p>\n<p>While allowing a person to quickly move on to solving the traveling salesperson part of the problem, Floyd\u2019s algorithm isn\u2019t considered as efficient as Dijkstra\u2019s algorithm for picking path optimization.<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 46.6667%; border-width: 1px; padding: 15px;\">\n<p><strong>Multi-Fragment Heuristic Algorithm<\/strong><\/p>\n<p>This algorithm considers the edges of a graph (or distances in the warehouse layout) rather than the vertices (points or storage locations in a warehouse layout). It sorts the edges by their weightings to find the shortest distance.<\/p>\n<p>While the multi-fragment heuristic algorithm is considered a better approach than the nearest neighbor strategy, it doesn\u2019t promise any accuracy.<\/p>\n<p>This is not a recommended approach for warehouse picking path optimization.<\/p>\n<\/td>\n<td style=\"width: 53.2367%; border-width: 1px; padding: 15px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 46.6667%; border-width: 1px; padding: 15px;\">\n<p><strong>Ant Colony Optimization Algorithm<\/strong><\/p>\n<p>Ants take off in random directions to find a food source, leaving behind pheromones as they travel to and from the source. The more pheromones, the better the travel route, so more ants use this path. In a warehouse, if workers first take off in random directions and then communicate the results of their path in real-time, the optimal pick path can be found in a reasonable time frame.<\/p>\n<p>This is a recommended approach in terms of its accuracy, but there are reservations because of how difficult it can be to execute.<\/p>\n<\/td>\n<td style=\"width: 53.2367%; border-width: 1px; padding: 15px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 46.6667%; border-width: 1px; padding: 15px;\">\n<p><strong>Twice Around the Tree Algorithm<\/strong><\/p>\n<p>This algorithm uses a spanning tree to find an optimal route by generating a list of vertices while walking around the spanning tree.<\/p>\n<p>It\u2019s a recommended approach for picking path warehouse optimization due to the amount of time it takes and its accuracy level.<\/p>\n<\/td>\n<td style=\"width: 53.2367%; border-width: 1px; padding: 15px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 46.6667%; border-width: 1px; padding: 15px;\">\n<p><strong>Christofides\u2019 Algorithm<\/strong><\/p>\n<p>An enhancement of the twice around the tree algorithm that uses a minimum spanning tree to create a Hamiltonian circuit (a path that visits every point once).<\/p>\n<\/td>\n<td style=\"width: 53.2367%; border-width: 1px; padding: 15px;\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4><\/h4>\n<h4><\/h4>\n<h4><span style=\"font-size: medium;\">What Is A Spanning Tree?<\/span><\/h4>\n<p>A spanning tree connects all the points (or vertices) in a graph while using the minimum number of edges. Meanwhile, a minimum spanning tree considers a graph\u2019s weight and creates a spanning tree with the minimum total weight.<\/p>\n<p class=\"in-content-optin\"><strong>Warehouse Layout Optimization.<\/strong> Make sure you\u2019re using the best warehouse layout design for your warehouse operations. Check out our <a href=\"\/blog\/optimize-warehouse-layout\" rel=\" noopener\">warehouse layout design<\/a> tips.<\/p>\n<h2 id=\"5\">Can I Run These Algorithms Automatically For My Picking Path Optimization?<\/h2>\n<p>Researchers at the Edinboro University of Pennsylvania have outlined a small case study of <a href=\"https:\/\/www.semanticscholar.org\/paper\/Warehouse-Pick-Path-Optimization-Algorithm-Analysis-Key-Dasgupta\/38a7c23700ed6c5c2115a44d5574987e3ee59a88?p2df\" target=\"_blank\" rel=\"nofollow noopener\">how these algorithms can be applied to a pick path optimization project<\/a>.<\/p>\n<p>Using a C# Windows application, a warehouse manager can create a graph representing the warehouse layout. They\u2019d then ask the application to use the nearest neighbor approach to solve for the traveling salesman challenge and then use Dijkstra\u2019s algorithm to solve for the shortest path part of the challenge.<\/p>\n<p>The problem with using this application is that it doesn\u2019t employ the recommended algorithms. As explained earlier, the nearest neighbor algorithm is not the most accurate way to determine the shortest route.<\/p>\n<h3><span style=\"font-size: medium;\">Pick Path Optimization Is A Math-Based Approach To An Old Problem<\/span><\/h3>\n<p>Pick path optimization can be a lot of work, particularly for those who aren\u2019t a fan of algorithms. But, understanding algorithms can help you understand \u201cheuristics\u201d or rules-of-thumb for optimizing your warehouse.<\/p>\n<p>While easy-to-use applications for these algorithms may be hard to come by, it is possible to start applying tactics inspired by these methods. As the warehouse industry becomes more competitive, continually acquiring knowledge about optimization techniques is non-negotiable.<\/p>\n<h2>Ready To Optimize Picking Paths for Warehouse Efficiency?<\/h2>\n<p><strong>Logiwa<\/strong> <a href=\"https:\/\/www.logiwa.com\/solutions\/digital-warehouse-management-software\">warehouse management software<\/a> optimizes the <a href=\"\/blog\/directed-putaway-algorithm-warehouse\" rel=\" noopener\">directed putaway<\/a> and picking path, saving your order pickers&#8217; effort and speeding up your warehouse operations. <a href=\"\/request-a-demo\" target=\"_blank\" rel=\"noopener\">Schedule a WMS demo of Logiwa today<\/a> and learn more..<\/p>\n<h2>Warehouse Optimization: FAQ<\/h2>\n<p><strong>What is warehouse optimization?<\/strong><\/p>\n<p>Warehouse optimization refers to the process of analyzing and improving various areas of warehouse operations to increase efficiency, productivity, and cost-effectiveness. It involves optimizing processes such as picking, packing, shipping, and inventory management to eliminate inefficiencies and streamline operations.<\/p>\n<p><strong>Why is pick path optimization important in warehouse optimization?<\/strong><\/p>\n<p>Pick path optimization is crucial in warehouse optimization because the picking process often accounts for a significant portion of labor efforts in a warehouse. By optimizing the pick path, which is the route followed by pickers to retrieve products, warehouses can reduce motion waste, improve picking speed and accuracy, and ultimately enhance overall warehouse efficiency.<\/p>\n<p><strong>What are heuristics and how do they apply to walking path optimization?<\/strong><\/p>\n<p>In the context of warehouse optimization, heuristics are practical methods or techniques used to accomplish a specific goal, even though they may not guarantee a perfect solution. When it comes to walking path optimization, heuristics provide workable solutions to address inefficiencies without the need for complex mathematical calculations. They serve as rule-of-thumb approaches to optimize walking paths for pickers in warehouses.<\/p>\n<p><strong>What are algorithms and how do they apply to walking path optimization?<\/strong><\/p>\n<p>An algorithm is a sequenced set of instructions used to solve a specific problem. In the context of walking path optimization, algorithms can be used to calculate the most efficient routes for pickers in a warehouse. They consider variables such as warehouse layout, item locations, and distances to determine optimized pick paths that minimize time and effort.<\/p>\n<p><strong>What are the two problems at the center of the picking path optimization process?<\/strong><\/p>\n<p>The two main algorithmic problems in picking path optimization are the Traveling Salesman Problem and the Shortest Path Problem. The Traveling Salesman Problem involves finding the shortest route to visit multiple locations and return to the starting point, while the Shortest Path Problem focuses on finding the shortest path between two points in a weighted graph. These problems are challenging to solve efficiently, but heuristics and algorithms offer viable solutions.<\/p>\n<p><strong>Which algorithms are available for walking pick path optimization?<\/strong><\/p>\n<p>Several algorithms can be used for walking pick path optimization, including Dijkstra&#8217;s algorithm, the Nearest Neighbor algorithm, Floyd&#8217;s algorithm, the Multi-Fragment Heuristic algorithm, the Ant Colony Optimization algorithm, the Twice Around the Tree algorithm, and Christofides&#8217; algorithm. Each algorithm has its own approach and level of accuracy, and the choice depends on the specific requirements and constraints of the warehouse.<\/p>\n<p><strong>Can these algorithms be run automatically for picking path optimization?<\/strong><\/p>\n<p>While there are applications and software available that can automate the use of these algorithms for picking path optimization, it is important to ensure that the selected algorithms align with the recommended approaches. Some applications may use suboptimal algorithms like the Nearest Neighbor algorithm, so it&#8217;s essential to choose the right tools or develop custom solutions that employ the most accurate and efficient algorithms for the specific optimization goals.<\/p>\n<p><strong>How can Logiwa WMS help with pick path optimization?<\/strong><\/p>\n<p>Logiwa warehouse management software offers features and capabilities to optimize directed putaway and picking paths, resulting in increased efficiency and speed in warehouse operations. By utilizing Logiwa&#8217;s WMS, warehouses can save effort for order pickers, improve picking accuracy, and accelerate overall warehouse performance. Scheduling a WMS demo with Logiwa can provide insights into how their solution can optimize your warehouse operations and pick path efficiency.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.18.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.18.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_code _builder_version=&#8221;4.18.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is warehouse optimization?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Warehouse optimization refers to the process of analyzing and improving various areas of warehouse operations to increase efficiency, productivity, and cost-effectiveness. It involves optimizing processes such as picking, packing, shipping, and inventory management to eliminate inefficiencies and streamline operations.\"}},{\"@type\":\"Question\",\"name\":\"Why is pick path optimization important in warehouse optimization?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Pick path optimization is crucial in warehouse optimization because the picking process often accounts for a significant portion of labor efforts in a warehouse. By optimizing the pick path, which is the route followed by pickers to retrieve products, warehouses can reduce motion waste, improve picking speed and accuracy, and ultimately enhance overall warehouse efficiency.\"}},{\"@type\":\"Question\",\"name\":\"What are heuristics and how do they apply to walking path optimization?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In the context of warehouse optimization, heuristics are practical methods or techniques used to accomplish a specific goal, even though they may not guarantee a perfect solution. When it comes to walking path optimization, heuristics provide workable solutions to address inefficiencies without the need for complex mathematical calculations. They serve as rule-of-thumb approaches to optimize walking paths for pickers in warehouses.\"}},{\"@type\":\"Question\",\"name\":\"What are algorithms and how do they apply to walking path optimization?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"An algorithm is a sequenced set of instructions used to solve a specific problem. In the context of walking path optimization, algorithms can be used to calculate the most efficient routes for pickers in a warehouse. They consider variables such as warehouse layout, item locations, and distances to determine optimized pick paths that minimize time and effort.\"}},{\"@type\":\"Question\",\"name\":\"What are the two problems at the center of the picking path optimization process?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The two main algorithmic problems in picking path optimization are the Traveling Salesman Problem and the Shortest Path Problem. The Traveling Salesman Problem involves finding the shortest route to visit multiple locations and return to the starting point, while the Shortest Path Problem focuses on finding the shortest path between two points in a weighted graph. These problems are challenging to solve efficiently, but heuristics and algorithms offer viable solutions.\"}},{\"@type\":\"Question\",\"name\":\"Which algorithms are available for walking pick path optimization?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Several algorithms can be used for walking pick path optimization, including Dijkstra's algorithm, the Nearest Neighbor algorithm, Floyd's algorithm, the Multi-Fragment Heuristic algorithm, the Ant Colony Optimization algorithm, the Twice Around the Tree algorithm, and Christofides' algorithm. Each algorithm has its own approach and level of accuracy, and the choice depends on the specific requirements and constraints of the warehouse.\"}},{\"@type\":\"Question\",\"name\":\"Can these algorithms be run automatically for picking path optimization?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"While there are applications and software available that can automate the use of these algorithms for picking path optimization, it is important to ensure that the selected algorithms align with the recommended approaches. Some applications may use suboptimal algorithms like the Nearest Neighbor algorithm, so it's essential to choose the right tools or develop custom solutions that employ the most accurate and efficient algorithms for the specific optimization goals.\"}},{\"@type\":\"Question\",\"name\":\"How can Logiwa WMS help with pick path optimization?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Logiwa warehouse management software offers features and capabilities to optimize directed putaway and picking paths, resulting in increased efficiency and speed in warehouse operations. By utilizing Logiwa's WMS, warehouses can save effort for order pickers, improve picking accuracy, and accelerate overall warehouse performance. Scheduling a WMS demo with Logiwa can provide insights into how their solution can optimize your warehouse operations and pick path efficiency.\"}}]}<\/script>[\/et_pb_code][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; disabled_on=&#8221;off|off|off&#8221; module_class=&#8221;recommended-content-callout&#8221; _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; use_background_color_gradient=&#8221;on&#8221; background_color_gradient_direction=&#8221;0deg&#8221; background_color_gradient_stops=&#8221;#6717cd 0%|#2d6ef9 100%&#8221; background_color_gradient_start=&#8221;#63a2d9&#8243; background_color_gradient_end=&#8221;#3469b2&#8243; custom_margin=&#8221;0px||0px||false|false&#8221; custom_padding=&#8221;30px|30px|50px|30px|false|false&#8221; border_radii=&#8221;on|12px|12px|12px|12px&#8221; box_shadow_style=&#8221;preset1&#8243; box_shadow_vertical=&#8221;0px&#8221; box_shadow_blur=&#8221;10px&#8221; box_shadow_color=&#8221;rgba(74,75,109,0.09)&#8221; saved_tabs=&#8221;all&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_row _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; width=&#8221;100%&#8221; custom_margin=&#8221;||20px||false|false&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_text _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; header_2_text_align=&#8221;center&#8221; header_2_text_color=&#8221;#FFFFFF&#8221; header_2_line_height=&#8221;32px&#8221; custom_margin=&#8221;||0px||false|false&#8221; custom_padding=&#8221;||0px||false|false&#8221; custom_css_main_element=&#8221;text-align: center !important;&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<\/p>\n<h2 class=\"animated growIn slower go\" data-id=\"1\">The Leading Supply Chain Management Software for \u201cNew Age\u201d B2C\/B2B Fulfillment Businesses<\/h2>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_3,1_3,1_3&#8243; use_custom_gutter=&#8221;on&#8221; gutter_width=&#8221;2&#8243; make_equal=&#8221;on&#8221; module_class=&#8221;blog-callout-tiles&#8221; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; width=&#8221;100%&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;1_3&#8243; module_class=&#8221;three-pl&#8221; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#FFFFFF&#8221; custom_padding=&#8221;30px|10px|60px|10px|false|false&#8221; box_shadow_style=&#8221;preset1&#8243; box_shadow_vertical=&#8221;13px&#8221; box_shadow_blur=&#8221;30px&#8221; box_shadow_color=&#8221;rgba(74,75,109,0.37)&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_text _builder_version=&#8221;4.18.0&#8243; _module_preset=&#8221;default&#8221; header_3_text_align=&#8221;center&#8221; header_3_text_color=&#8221;#413885&#8243; text_orientation=&#8221;center&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<\/p>\n<h3 style=\"text-align: center;\">3PL<\/h3>\n<p>Cloud 3PL software for high-volume fulfillment excellence<\/p>\n<p>&nbsp;<\/p>\n<p class=\"more\"><a class=\"read-more\" href=\"https:\/\/www.logiwa.com\/industries\/cloud-3pl-software\">3PL WMS<\/a><\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_3&#8243; module_class=&#8221;warehouse-management&#8221; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#FFFFFF&#8221; custom_padding=&#8221;30px|10px|60px|10px|false|false&#8221; box_shadow_style=&#8221;preset1&#8243; box_shadow_vertical=&#8221;13px&#8221; box_shadow_blur=&#8221;30px&#8221; box_shadow_color=&#8221;rgba(74,75,109,0.37)&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_text _builder_version=&#8221;4.18.0&#8243; _module_preset=&#8221;default&#8221; header_3_text_align=&#8221;center&#8221; header_3_text_color=&#8221;#413885&#8243; text_orientation=&#8221;center&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<\/p>\n<h3 style=\"text-align: center;\">Warehouse Management<\/h3>\n<p>Modern digital cloud WMS powers a modern fulfillment experience<\/p>\n<p>&nbsp;<\/p>\n<p class=\"more\"><a class=\"read-more\" href=\"https:\/\/www.logiwa.com\">WMS<\/a><\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_3&#8243; module_class=&#8221;inventory-management&#8221; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#FFFFFF&#8221; custom_padding=&#8221;30px|10px|60px|10px|false|false&#8221; box_shadow_style=&#8221;preset1&#8243; box_shadow_vertical=&#8221;13px&#8221; box_shadow_blur=&#8221;30px&#8221; box_shadow_color=&#8221;rgba(74,75,109,0.37)&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_text _builder_version=&#8221;4.18.0&#8243; _module_preset=&#8221;default&#8221; header_3_text_align=&#8221;center&#8221; header_3_text_color=&#8221;#413885&#8243; text_orientation=&#8221;center&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<\/p>\n<h3 style=\"text-align: center;\">Inventory Management<\/h3>\n<p>Improve your inventory across your supply chain.<\/p>\n<p>&nbsp;<\/p>\n<p class=\"more\"><a class=\"read-more\" href=\"https:\/\/www.logiwa.com\/industries\/ecommerce-inventory-management-software\">IMS<\/a><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this article, we&#8217;ll explore the intriguing world of warehouse optimization, with a particular emphasis on algorithms used for picking path optimization. You&#8217;ll gain an understanding of how today&#8217;s competitive warehouses have evolved their practices, with a spotlight on how optimization methods can reduce labor efforts, increase efficiency, and improve accuracy. From unpacking complex terms [&hellip;]<\/p>\n","protected":false},"author":29,"featured_media":9754,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"Managing a warehouse in the 21st century is a whole new ballgame.\r\n\r\n<!--more-->\r\n\r\nIn the past, it was enough to keep a clean, well-organized facility and schedule a decent number of pickers.\r\n\r\nNow, warehouses stay competitive by optimizing every possible area of work\u2014from picking to packing to shipping. With new warehouses cropping up every day, and customer demand for speedy deliveries rising, distribution centers don\u2019t have the option of phoning it in. They must analyze their warehouses from top to bottom to look for inefficiencies and nip them in the bud.\r\n\r\nOne warehouse process that\u2019s ripe for warehouse optimization is the pick path. According to some estimates, picking takes up over 50% of a warehouse\u2019s labor efforts. This isn\u2019t surprising considering that, despite <a href=\"\/blog\/warehouse-technology-trends\" rel=\" noopener\">warehouse technological advancements<\/a> in areas like automated storage and retrieval systems, picking is still a largely human-led process.\r\n\r\nNevertheless, it\u2019s possible to further optimize picking and, more specifically, the pick path. Oftentimes, the biggest cause of inefficiency during the picking process is <a href=\"\/blog\/motion-waste\" rel=\" noopener\">motion waste<\/a> - the unnecessary movement that makes a given task take longer than it should.\r\n\r\nWalking path optimization\u2014or picking path optimization, depending on who you talk to\u2014is the process of finding the fastest way to navigate the warehouse in order to pick products quickly, accurately, and efficiently by using various picking methods such as <a href=\"\/blog\/warehouse-wave-picking\" rel=\" noopener\">wave picking<\/a>, <a href=\"\/blog\/zone-picking-pick-and-pass\" rel=\" noopener\">zone picking<\/a>.\r\n\r\n<!-- Table of Contents -->\r\n<div class=\"blog-toc\">\r\n\r\nIn this article, we will walk you through some methods for walking path optimization for pickers:\r\n<ol>\r\n \t<li><a href=\"#1\" rel=\" noopener\">What Is A Heuristic and How Does It Apply To Walking Path Optimization for Pickers?<\/a><\/li>\r\n \t<li><a href=\"#2\" rel=\"noopener\">What Is An Algorithm and How Does It Apply To Walking Path Optimization?<\/a><\/li>\r\n \t<li><a href=\"#3\" rel=\"noopener\">The Two Problems at the Center of the Picking Path Optimization Process<\/a><\/li>\r\n \t<li><a href=\"#4\" rel=\"noopener\">Which Algorithms Are Available for Walking Pick Path Optimization?<\/a><\/li>\r\n \t<li><a href=\"#5\" rel=\"noopener\">Can I Run These Algorithms Automatically For My Picking Path Optimization?<\/a><\/li>\r\n<\/ol>\r\n<\/div>\r\n<!-- In-Page Optin Box --> <!-- In-Page Optin Box -->\r\n<p class=\"in-content-optin\"><strong>BONUS:<\/strong> Before you go any further, download our <a href=\"\/resources\/guides\/order-picking-guide\" target=\"_blank\" rel=\"noopener\">Order Picking Strategies guide<\/a> where we compare order-based, cluster, and batch-picking methods to see which method leads to the highest productivity.<\/p>\r\n\r\n<h2 id=\"1\">What Is A Heuristic and How Does It Apply To Walking Path Optimization for Pickers?<\/h2>\r\nIf you research algorithms to optimize any area of warehouse management, you\u2019ll likely hear the word \u201cheuristic\u201d a lot. It\u2019s one of those words tossed in to confuse readers into throwing their hands up in the air and giving up on the entire endeavor.\r\n<blockquote>In the context of warehouse optimization, a heuristic or heuristic technique is a method of accomplishing a specific goal that is suitable for practical purposes, but isn\u2019t guaranteed to be perfect.<\/blockquote>\r\nFor example, when you apply a rule of thumb or make an educated guess, you\u2019re using a heuristic technique.\r\n\r\nWhen talking about warehouse management, researchers come up with processes and algorithms designed to address warehouse inefficiencies without necessarily producing a perfect approach. This is because at the core of many warehouse management problems are difficult math problems that are still being worked out by academics.\r\n\r\nIf the warehouse industry waited for a perfect solution to every math problem at the foundation of warehouse management problems, (see: bin packing and knapsack problem) we\u2019d be working in very inefficient warehouses for a very long time!\r\n\r\nSo, whenever you hear someone use the word \u201cheuristic,\u201d remember that they\u2019re just referring to an \u201cokay for now\u201d method. It\u2019s a way of saying the solution isn\u2019t perfect. In fact, you can probably ignore the term altogether whenever you see it.\r\n<div id=\"integrations\" class=\"dark-blue-bg\">\r\n<div class=\"container\">\r\n<div class=\"row\">\r\n<div class=\"col-md-9 mx-auto\" align=\"center\">\r\n<div class=\"integrations-intro\">\r\n<div class=\"animatedParent\" data-sequence=\"500\"><\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<div class=\"row\">\r\n<div class=\"col-lg-4 col-md-6\">\r\n<div class=\"animatedParent\">\r\n<div class=\"integration-box animated growIn go\">\r\n\r\n<span style=\"color: #333333; font-size: 22px;\">What Is An Algorithm and How Does It Apply To Walking Path Optimization?<\/span>\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\u201cAlgorithm\u201d is another word that\u2019ll pop up often when you read about topics like walking path optimization. It sounds complicated, but it\u2019s not.\r\n\r\nAn algorithm is just a sequenced list of instructions. When you bake a cake, you use a recipe and that recipe can be considered an algorithm. If you were to build a machine that created a cake for you from scratch, and all you needed to do was upload the recipe, you\u2019d essentially be feeding your \u201ccake-making machine\u201d an algorithm that it would use to make a dessert.\r\n\r\nThe algorithm would let the machine know that it needs to crack the eggs before putting them in the bowl.\r\n\r\nIn warehouse optimization scenarios, there are algorithms for any number of processes. In the case of walking path optimization, a warehouse manager may have an algorithm where he or she can plug in certain variables and obtain an optimized pick path.\r\n\r\n<!-- In-Page Optin Box -->\r\n<p class=\"in-content-optin\"><strong>Order picking accounts for 60% of your warehouse operational costs.<\/strong>\u00a0Make sure you\u2019re using the most cost-effective order picking strategy by reading our detailed guide where we <a href=\"\/resources\/guides\/order-picking-guide\" target=\"_blank\" rel=\"noopener\">compare the 3 most common order picking methods.<\/a><\/p>\r\n\r\n<h3 id=\"3\">The Two Problems at the Center of the Picking Path Optimization Process<\/h3>\r\nRemember when we mentioned that larger math problems sit at the center of many warehouse optimization problems? The same idea applies to the walking path optimization process. In this area, we\u2019re faced with two big algorithmic problems:\r\n<ul>\r\n \t<li>The Traveling Salesman Problem<\/li>\r\n \t<li>The Shortest Path Problem<\/li>\r\n<\/ul>\r\nBoth problems are tricky algorithmic problems to solve when faced with a large data set. This is why industry professionals devise \u201cheuristics\u201d to provide workable solutions in a warehouse management context.\r\n<h4>The Traveling Salesman Problem<\/h4>\r\nWhile the traveling salesman job may be dying out, the traveling salesman problem is still alive and kicking.\r\n\r\nSuppose you\u2019re a traveling salesman with several locations to visit. How do you take the shortest (quickest) route to visit all of these destinations once and ultimately wind up back in your starting city?\r\n\r\nNow, you could figure this out through trial and error, which is known as the \u201cbrute force\u201d method. If you\u2019re only hitting four or five locations, you map out every possible route and pick the shortest route.\r\n\r\nBut what if you\u2019re hitting up dozens of locations spread out across a large geography? In the time it takes you to map out every possible route and pick the best one, you could\u2019ve completed your trip.\r\n\r\nNormally, this is where algorithms come in to make life easier. You\u2019ve got a problem. You plug in the variables. The algorithm does the time-intensive number crunching quickly and boom, you\u2019ve got an answer.\r\n\r\nBut the traveling salesman problem is classified as an NP-hard problem, which means it\u2019s rather difficult to solve in a reasonable amount of time. This is why \u201cheuristics\u201d exist. They\u2019re our \u201cgood enough\u201d solutions to keep things moving.\r\n<h4>The Shortest Path Problem<\/h4>\r\nAs the name implies, the shortest path problem is about finding the shortest path between two points, also known as \u201cnodes\u201d or \u201cvertices\u201d as they\u2019re referred to in graph theory. Connecting these vertices are lines or \u201cedges.\u201d\r\n\r\nThe shortest path problem finds the shortest path between two nodes in a weighted graph\u2014a graph where the edges (the lines between two points) have a specific value. That value could be the distance or even the cost.\r\n\r\nIn other words, a weighted graph represents the labor cost associated with moving through your warehouse, and the shortest path problem is about finding the quickest, cheapest way to move from one point to the next.\r\n\r\nWhen the values are positive, the shortest path problem is considered solvable in a reasonable amount of time, unlike the traveling salesman problem. Since most warehouse managers aren\u2019t in the habit of labeling graphs with negative dollar values or negative measurements, that\u2019s good news.\r\n\r\nIn fact, a number of algorithms exist for tackling the shortest path problem.\r\n<h3 id=\"4\">Which Algorithms Are Available for Walking Pick Path Optimization?<\/h3>\r\nAs you can probably tell by now, <a href=\"https:\/\/pdfs.semanticscholar.org\/38a7\/c23700ed6c5c2115a44d5574987e3ee59a88.pdf?_ga=2.267604174.1195041994.1563217124-758930465.1563217124\" target=\"_blank\" rel=\"nofollow noopener\">walking path optimization requires warehouses to address both the traveling salesman problem and the shortest path problem<\/a>.\r\n<ol>\r\n \t<li>You must solve the traveling salesman problem for all storage spots in a warehouse order. The start and end point is the shipping area.<\/li>\r\n \t<li>Simultaneously, as you move through the traveling salesman problem while filling the order, you also must address the shortest path problem while moving from a given item location (node or vertices) to all other item locations.<\/li>\r\n<\/ol>\r\nIn other words, you need to find the shortest point between all the nodes before you\u2019re able to find the shortest path <i>through <\/i>all the nodes.\r\n\r\nThis is because there\u2019s no guarantee that every node is connected with one edge, which is necessary for a standard approach to the traveling salesman problem. As a result, you must find the shortest distance between each node first.\r\n\r\nThere are a <a href=\"https:\/\/pdfs.semanticscholar.org\/38a7\/c23700ed6c5c2115a44d5574987e3ee59a88.pdf?_ga=2.267604174.1195041994.1563217124-758930465.1563217124\" target=\"_blank\" rel=\"nofollow noopener\">number of different algorithms for each problem<\/a>.\r\n<table style=\"border-width: 1px;\">\r\n<tbody>\r\n<tr>\r\n<td style=\"width: 339px; border-width: 1px; padding: 15px;\"><strong>Traveling Salesperson Problem<\/strong><\/td>\r\n<td style=\"width: 390px; border-width: 1px; padding: 15px;\"><strong>Shortest Path Problem<\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 339px; border-width: 1px; padding: 15px;\"><strong>Exhaustive Search Algorithm<\/strong>\r\n\r\nThis approach considers every possible tour path. If the exhaustive search method is completed, it will definitely find the shortest route, but it is highly complex and unviable with a large amount of data.\r\n\r\nThe exhaustive search method is not considered an efficient algorithm for picking path optimization.<\/td>\r\n<td style=\"width: 390px; border-width: 1px; padding: 15px;\"><strong>Dijkstra\u2019s Algorithm<\/strong>\r\n\r\nThe shortest distance between a select number of starting points and all other vertices is found.\r\n\r\nIt\u2019s a useful and popular starting point for picking path optimization. As a result, there has been an extensive amount of research on this algorithm resulting in enhancements like:\r\n<ul>\r\n \t<li>Subgraph Partitioning<\/li>\r\n \t<li>Bidirectional Search<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 339px; border-width: 1px; padding: 15px;\"><strong>Nearest Neighbor Algorithm<\/strong>\r\n\r\nThis is a straightforward approach in which you start at the point closest to your starting point and continue through your path by moving to the nearest item. Naturally, there\u2019s no guarantee that you\u2019re going to take the best route this way. It just eliminates having to think about the process.\r\n\r\nThis is not a recommended approach for warehouse picking path optimization.<\/td>\r\n<td style=\"width: 390px; border-width: 1px; padding: 15px;\"><strong>Floyd\u2019s Algorithm<\/strong>\r\n\r\nThe optimal distance between all points is found.\r\n\r\nWhile allowing a person to quickly move on to solving the traveling salesperson part of the problem, Floyd\u2019s algorithm isn\u2019t considered as efficient as Dijkstra\u2019s algorithm for picking path optimization.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 339px; border-width: 1px; padding: 15px;\"><strong>Multi-Fragment Heuristic Algorithm<\/strong>\r\n\r\nThis algorithm considers the edges of a graph (or distances in the warehouse layout) rather than the vertices (points or storage locations in a warehouse layout). It sorts the edges by their weightings to find the shortest distance.\r\n\r\nWhile the multi-fragment heuristic algorithm is considered a better approach than the nearest neighbor strategy, it doesn\u2019t promise any accuracy.\r\n\r\nThis is not a recommended approach for warehouse picking path optimization.<\/td>\r\n<td style=\"width: 390px; border-width: 1px; padding: 15px;\"><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 339px; border-width: 1px; padding: 15px;\"><strong>Ant Colony Optimization Algorithm<\/strong>\r\n\r\nAnts take off in random directions to find a food source, leaving behind pheromones as they travel to and from the source. The more pheromones, the better the travel route, so more ants use this path. In a warehouse, if workers first take off in random directions and then communicate the results of their path in real time, the optimal pick path can be found in a reasonable time frame.\r\n\r\nThis is a recommended approach in terms of its accuracy, but there are reservations because of how difficult it can be to execute.<\/td>\r\n<td style=\"width: 390px; border-width: 1px; padding: 15px;\"><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 339px; border-width: 1px; padding: 15px;\"><strong>Twice Around the Tree Algorithm<\/strong>\r\n\r\nThis algorithm uses a spanning tree to find an optimal route by generating a list of vertices while walking around the spanning tree.\r\n\r\nIt\u2019s a recommended approach for picking path optimization due to the amount of time it takes and its accuracy level.<\/td>\r\n<td style=\"width: 390px; border-width: 1px; padding: 15px;\"><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 339px; border-width: 1px; padding: 15px;\"><strong>Christofides\u2019 Algorithm<\/strong>\r\n\r\nAn enhancement of the twice around the tree algorithm that uses a minimum spanning tree to create a Hamiltonian circuit (a path that visits every point once).<\/td>\r\n<td style=\"width: 390px; border-width: 1px; padding: 15px;\"><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<h4>What Is A Spanning Tree?<\/h4>\r\nA spanning tree connects all the points (or vertices) in a graph while using the minimum number of edges. Meanwhile, a minimum spanning tree considers a graph\u2019s weight and creates a spanning tree with the minimum total weight.\r\n\r\n<!-- In-Page Optin Box -->\r\n<p class=\"in-content-optin\"><strong>Warehouse Layout Optimization.<\/strong> Make sure you\u2019re using the best warehouse layout design for your warehouse operations. Check out our <a href=\"\/blog\/optimize-warehouse-layout\" rel=\" noopener\">warehouse layout design<\/a> tips.<\/p>\r\n\r\n<h3 id=\"5\">Can I Run These Algorithms Automatically For My Picking Path Optimization?<\/h3>\r\nResearchers at the Edinboro University of Pennsylvania have outlined a small case study of <a href=\"https:\/\/pdfs.semanticscholar.org\/38a7\/c23700ed6c5c2115a44d5574987e3ee59a88.pdf?_ga=2.267604174.1195041994.1563217124-758930465.1563217124\" target=\"_blank\" rel=\"nofollow noopener\">how these algorithms can be applied to a pick path optimization project<\/a>.\r\n\r\nUsing a C# Windows application, a warehouse manager can create a graph representing the warehouse layout. They\u2019d then ask the application to use the nearest neighbor approach to solve for the traveling salesman challenge and then use Dijkstra\u2019s algorithm to solve for the shortest path part of the challenge.\r\n\r\nThe problem with using this application is that it doesn\u2019t employ the recommended algorithms. As explained earlier, the nearest neighbor algorithm is not the most accurate way to determine the shortest route.\r\n<h3>Pick Path Optimization Is A Math-Based Approach To An Old Problem<\/h3>\r\nPick path optimization can be a lot of work, particularly for those who aren\u2019t a fan of algorithms. But, understanding algorithms can help you understand \u201cheuristics\u201d or rules-of-thumb for optimizing your warehouse.\r\n\r\nWhile easy-to-use applications for these algorithms may be hard to come by, it is possible to start applying tactics inspired by these methods. As the warehouse industry becomes more competitive, continually acquiring knowledge about optimization techniques is a non-negotiable.\r\n\r\nLogiwa optimizes the <a href=\"\/blog\/directed-putaway-algorithm-warehouse\" rel=\" noopener\">directed putaway<\/a> and picking path, saving your workers effort and speeding up your warehouse operations. <a href=\"\/demo\" target=\"_blank\" rel=\"noopener\">Schedule a WMS demo of Logiwa today.<\/a>","_et_gb_content_width":"","content-type":"","inline_featured_image":false,"_lmt_disableupdate":"no","_lmt_disable":"no","footnotes":""},"categories":[34,33,36],"tags":[],"class_list":["post-1142","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-inventory-management","category-warehouse-management","category-wms"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v19.1 (Yoast SEO v25.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Warehouse Optimization: Algorithms for Picking Path Optimization | Logiwa | WMS<\/title>\n<meta name=\"description\" content=\"Discover effective algorithms for pick path optimization in warehouse operations and revolutionize your efficiency. 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