Imagine a warehouse handling several thousand orders every day. Parcels coming in from multiple sales channels, dozens of couriers collecting shipments at different times, and warehouse workers walking through rows of shelving with printed picking lists in hand. Sound familiar? For many companies, especially those rapidly expanding their online sales, this is not a vision of the future but an everyday reality. And this is exactly where warehouse management based on paper lists or spreadsheets starts to fall apart.
A WMS, or Warehouse Management System, is software that takes control of the entire physical flow of goods within a warehouse — from receiving deliveries, through storage, picking and packing, to handing parcels over to the courier. It is the foundation of modern logistics efficiency and an essential element of a scalable, accurate supply chain.
In this article, we explain exactly what a WMS is and how it works, how it differs from an ERP system, what specific benefits warehouse management software can bring, what working with a WMS looks like in practice, and what role modern technologies — from RFID to artificial intelligence — play in these systems. Whether you have been managing a warehouse for years or are only setting up your first one, this guide will give you a solid basis for making an informed decision.
Warehouse Management System Overview
Before going into detail, it is worth establishing a solid conceptual foundation. There are many IT tools on the market that support processes related to goods and inventory, and the relevant terms are often used interchangeably — frequently incorrectly. Below, we explain precisely what a warehouse management system is and where the boundary between a WMS and an ERP system lies.
WMS Definition — What Does the Term Mean?
A WMS, or Warehouse Management System, is specialised warehouse software designed to manage, coordinate and optimise all operations taking place within the physical warehouse environment. In other words, a WMS knows where every pallet, package and individual item is located at any given moment.
While a standard spreadsheet may tell you that you have 500 units of a particular product in stock, a warehouse management system will tell you precisely that those 500 units are stored on rack B-12, on the third level, across three locations, the first of which will be used according to the FEFO principle. This is not a minor difference — it is a major operational divide that can translate directly into significant costs when inventory turnover is high.
A good WMS supports the entire lifecycle of goods within the warehouse: receiving and verifying deliveries, generating logistics labels, selecting optimal storage locations, picking orders, packing, quality control and dispatch. It performs these tasks in real time while communicating with employees’ mobile terminals, label printers, ERP systems and sales platforms.
WMS vs ERP — A Common Source of Confusion
This is one of the most common areas of confusion among business owners considering the digitalisation of their logistics operations. An ERP system, or Enterprise Resource Planning system, is software used to manage the entire company, including finance, manufacturing, sales, purchasing and human resources. Most ERP systems include a warehouse or inventory module, but this module primarily manages inventory from an accounting and financial perspective rather than a physical one.
Put simply, an ERP system answers the question: “How much stock do I have and what is it worth?” A WMS answers: “Where exactly is this stock and how can it be picked from the shelves as efficiently as possible?” A warehouse module within an ERP system will not usually manage locations dynamically, optimise picking routes or provide comprehensive support for cycle counting. This operational gap is what justifies the implementation of a dedicated WMS.
Naturally, the two systems need to communicate with one another. This is where system integration through well-designed APIs becomes essential. An order entered into the ERP system is automatically transferred to the WMS as a picking task. Once the WMS confirms that the order has been dispatched, the ERP system updates the inventory level and initiates invoicing. The differences between ERP and WMS therefore lie primarily in the operational layer — the two systems complement rather than compete with each other.
In manufacturing companies, this relationship is even more complex. An ERP system such as Microsoft Dynamics 365 Business Central manages production planning, work orders and production cost accounting, while the WMS ensures that the correct components and raw materials arrive at exactly the right place and time on the shop floor.
What Does a WMS Do?
Theory is one thing, but warehouse operations are what truly matter. A WMS is involved at every stage of the flow of goods, and it is this comprehensive presence that makes the system so important. Below, we discuss three key processes in which a WMS can fundamentally transform warehouse operations.
Goods Receiving and Optimal Putaway
When a delivery truck arrives at the loading dock, a race against time and potential errors begins. An employee scans the barcodes or SSCC labels on each pallet, and the WMS instantly verifies whether the goods being received match the purchase order registered in the ERP system — including the items, quantities and, where necessary, batch numbers or expiry dates.
Once the delivery has been verified, the WMS generates logistics labels and — unlike a manually managed process — automatically indicates where each item should be stored. When optimising storage space, the system considers dimensions, weight, temperature requirements, the product’s ABC turnover classification and the available warehouse zones. Heavy products are directed to the lower levels of the racks, fast-moving products are placed close to dispatch areas, and goods requiring an uninterrupted cold chain are sent to dedicated cold-storage zones.
As a result, putaway is no longer based on an individual employee’s intuition. It becomes a data-driven process. In practice, this means not only better use of available warehouse space, but also shorter picking routes in the future. Every metre saved during putaway generates repeated savings when orders are later collected.
Order Picking and Packing
Order picking is at the heart of warehouse operations and is also the area in which a WMS can deliver the greatest return on investment. Without a system, a warehouse employee receives a printed list of items and plans their own route through the racks. With a WMS, a mobile data terminal guides the employee along a predefined and optimised picking route, minimising the distance travelled on foot or by forklift.
Modern WMS solutions support several picking methods adapted to different order profiles. Multi-picking allows one employee to collect items for several separate orders simultaneously, placing them in different containers. Zone picking divides the warehouse into defined areas of responsibility and allows employees to specialise in particular zones. A good system dynamically selects the most appropriate method according to the current workload and the characteristics of the orders being processed.
The WMS completes the shipping preparation process with a two-stage verification during packing. The employee scans the collected items, and the system confirms that they match the order before the parcel is sealed. Only then is a shipping label printed with the assigned tracking number. This verification mechanism eliminates the majority of shipping errors.
Inventory Control and Stocktaking
For many companies, traditional annual stocktaking means several days of operational downtime, a large team of employees manually counting items and a considerable risk of errors caused by fatigue. A WMS provides an alternative: cycle counting performed without interrupting normal warehouse operations.
Under a cycle-counting model, the system automatically schedules selected locations to be counted every day — for example, 50 locations per day in a warehouse with 5,000 pallet spaces. Inventory control takes place in the background alongside routine operations, while the warehouse manager has access to an up-to-date view of stock levels at all times.
Real-time updates mean that moments after an employee picks the final unit from a particular location, the WMS communicates this information to the ERP system, which can then automatically trigger a purchase order.
Five Benefits of a Warehouse Management System
Implementing a WMS is an investment that should generate tangible and measurable business benefits. Below, we discuss five of the most important advantages, supporting each one with a practical argument relevant to those responsible for the company’s operational performance.
Reducing Errors in Shipping Processes
Picking mistakes are among the largest hidden costs in e-commerce and distribution. A customer who receives an XL product instead of the size M they ordered will not only return it. They may also post a negative review, call customer service and, in the worst-case scenario, decide not to make any further purchases.
When the cost of handling a complaint, arranging a replacement shipment and losing future revenue is taken into account, a single shipping error may cost many times more than the value of the parcel itself.
A WMS eliminates this problem at its source. Scan-based verification at every stage — when collecting the product from the rack, during packing and at dispatch — means that a properly configured WMS can achieve order accuracy of 99.8–99.9%. This is not simply a marketing claim. It is a measurable reduction in errors that translates into fewer returns, lower service costs and a higher Net Promoter Score.
Optimising the Use of Warehouse Space
Warehouse space is expensive, whether the company owns the facility and bears the costs of construction, depreciation and heating, or outsources its warehouse operations and pays per square metre or pallet location. A WMS makes it possible to extract considerably more value from the available space than intuition alone would suggest.
Dynamic location management, also known as random storage, means that products do not have permanently assigned locations. Instead, they are stored wherever suitable space is currently available, according to an algorithm that considers turnover, dimensions and warehouse zones.
When combined with high-bay warehouse management and multi-level racking, this approach can shorten picking times even in a densely packed facility and increase warehouse space utilisation by 20–30% compared with a fixed-location layout.
Faster Order Fulfilment
In today’s e-commerce market, order fulfilment time is one of the key factors in building a competitive advantage. Customers who place an order before midday expect the parcel to leave the warehouse on the same day. When several thousand orders are being processed daily, achieving this without an efficient WMS is close to impossible.
A WMS optimises every minute of the process. Picking routes are shorter, verification is automatic, labels are printed without manually re-entering addresses, and the prioritisation of express orders or deliveries required by a particular time takes place in the background.
Warehouse productivity, measured by the number of order lines picked per working hour, can increase by 30–50% following the implementation of a WMS. This directly improves shipping speed and customer satisfaction.
Full Product Traceability
For companies operating in regulated industries — including food, pharmaceuticals, cosmetics and, in particular, manufacturing — batch traceability is not optional. It is both a legal and a business requirement.
A WMS supports FIFO — First In, First Out — FEFO — First Expired, First Out — and LIFO — Last In, First Out — rules. Every product collected from a specific location can therefore be assigned to a particular batch and serial number.
In practice, logistics traceability means that when a product recall is necessary, the company can identify within minutes — rather than hours or days — which customers received products from the affected batch and take the appropriate corrective action.
Tracking product batches throughout the supply chain is one of the areas in which IT Vision supports manufacturing companies by implementing integrated ERP environments with dedicated extensions. You can learn more about how DSR 4Factory manufacturing systems support quality and batch tracking at every stage of the process in our dedicated product section.
Faster Employee Onboarding and Lower Operating Costs
Employee turnover in warehouses can be high, particularly during peak e-commerce seasons or periods of rapid business growth. A new employee entering the warehouse without knowledge of the rack layout or operating procedures may remain unproductive for the first several weeks and increase the risk of operational errors.
A WMS significantly shortens the learning curve. A mobile data terminal guides a new warehouse employee step by step: go to rack B-07, level two, collect three units, scan them and continue to the next location.
Employees do not need to memorise the warehouse layout or understand the logic behind order prioritisation — the system handles this for them. As a result, employee onboarding can be reduced from several weeks to one or two working days. This directly lowers warehouse operating costs and reduces dependence on highly experienced personnel.
It also demonstrates that warehouse automation does not necessarily mean eliminating people. Instead, it can improve their productivity and lower the entry barrier to working effectively within the operation.
Warehouse Management Systems in Practice
The theory behind WMS design is one thing. The daily reality of working in a warehouse equipped with such software is another. It is worth considering both the specific tools used by employees and the characteristics of different industries, as these can affect functional requirements more significantly than might initially be expected.
Work Tools — How Do Employees Interact with a WMS?
The primary tool used by a warehouse employee is a mobile terminal — a rugged tablet or WMS data collection device equipped with a barcode scanner, a task display and a housing designed to withstand warehouse conditions.
This interface is how the WMS tells the employee what to do and in what order. A few taps and a single scan are enough for the system to register that the task has been completed.
RFID technology is used in warehouses that require contactless operations or remote identification. RFID labels placed on pallets or containers can be read in bulk as they pass through a gate, without the need to scan each item individually. This reduces the time required for receiving and stocktaking to a fraction of that needed when using standard 1D or 2D barcode scanning.
Voice-picking systems are also becoming increasingly popular. Employees receive instructions through a headset and confirm the completion of tasks using voice commands. Because their hands remain free and their attention can stay focused on the racks, employees make fewer errors and work more quickly.
This solution is particularly useful when picking products in cold-storage facilities, where operating a screen while wearing thick gloves can be difficult.
WMS in E-commerce and Contract Logistics
E-commerce operations have specific characteristics that place different requirements on a WMS than traditional distribution. Online stores are dominated by single-item or small multi-item orders processed in small quantities, often numbering hundreds or thousands per day.
The key objective is therefore not to maximise the number of pallets handled per hour, but to minimise the cycle time of each individual order while processing a very large number of tasks simultaneously.
A WMS for e-commerce must support integrations with sales platforms such as Allegro, Shopify, Magento and WooCommerce, as well as courier services and Order Management Systems. These integrations must operate in near real time.
Warehouses operated by 3PL, or Third-Party Logistics, providers are a particularly demanding category. They serve multiple customers simultaneously, each with their own range of products, procedures and reporting requirements.
A WMS operating in a multi-client environment must provide complete separation of inventory and operations between the different owners of the goods while also supporting a flexible division of the available warehouse space.
Types of Warehouse Management Systems
The WMS software market currently offers a wide range of solutions, from straightforward SaaS applications to advanced, dedicated monolithic systems. Choosing the right architecture has a major impact on implementation costs, deployment time and scalability. It is therefore important to understand the fundamental differences before beginning discussions with potential suppliers.
Cloud WMS vs On-Premises Systems
The cloud-based SaaS model is currently the dominant direction in the development of the WMS market. A cloud WMS can be launched more quickly — sometimes within a matter of weeks — does not require an organisation to maintain its own server infrastructure and is usually paid for through a monthly subscription.
This is particularly attractive to small and medium-sized companies that do not have their own IT departments and value the ability to transfer responsibility for updates and security to the software provider.
On-premises systems provide greater control over data and infrastructure. This may be essential in regulated environments or where integration with highly specialised equipment is required.
Implementing an on-premises WMS is more expensive and takes longer, but it may offer greater performance at extremely high transaction volumes and support complete customisation without the restrictions imposed by a SaaS provider.
The choice between SaaS software and an organisation’s own installation is a strategic decision that should be preceded by a thorough analysis of existing processes and future growth plans.
Standalone Systems vs Integrated Solutions
Another important consideration is whether the WMS should operate as an independent application or as a module built into the ERP system.
A dedicated standalone WMS will generally provide deeper operational functionality, including more advanced picking algorithms, more flexible location management and broader configuration options. It is an appropriate choice for companies in which warehouse operations are a core part of the business.
On the other hand, integrating warehouse functionality into the ERP environment means fewer interfaces to maintain, lower IT costs and a simpler flow of data between different areas of the company.
For many organisations — particularly those in which the WMS is intended to supplement a comprehensive ERP system such as Business Central — a standalone system may be unnecessarily complex.
The key question is: how large and complex are your warehouse operations?
Find out why it is worth considering inventory and logistics management as part of an integrated ERP ecosystem.
Intelligent Warehousing Technology
WMS solutions continue to evolve. A decade ago, the intelligent warehouse was largely a concept featured in trade show brochures. Today, it is a reality being implemented by leading manufacturing, distribution and logistics companies.
Two areas deserve particular attention: integration with physical warehouse automation and the use of artificial intelligence algorithms.
Integrating a WMS with Warehouse Automation
A modern, fully automated warehouse involves more than software. It also includes physical equipment such as conveyor belts, sorters, stacker cranes for high-bay racking, ASRS solutions — Automated Storage and Retrieval Systems — and an increasing number of AGV and AMR warehouse robots.
AGVs, or Automated Guided Vehicles, and AMRs, or Autonomous Mobile Robots, transport containers independently between workstations.
The software acting as an intermediary between the WMS and these machines is known as a WCS — Warehouse Control System — or an MFS — Material Flow System.
The WCS translates abstract instructions from the WMS, such as “collect container 12345 from location X and deliver it to packing station 3”, into specific control commands for the physical equipment.
Warehouse automation at this level is an investment intended for large-scale operations, but its impact on throughput, accuracy and labour costs is difficult to overstate.
As a company specialising in the manufacturing sector, IT Vision understands that intralogistics — the internal flow of materials and components within a factory — is just as critical as external logistics.
Managing buffers between production cells and finished-goods warehouses, as well as sequencing components for assembly lines, requires effective cooperation between the WMS and MES and APS systems, such as those offered by our partner DSR as part of its 4Factory portfolio for manufacturing companies.
Artificial Intelligence and Advanced Analytics in WMS
A traditional WMS responds to events by processing what has already happened. An intelligent WMS supported by machine-learning algorithms predicts what is likely to happen and prepares the operation accordingly.
Artificial intelligence in logistics is no longer a concept of the future. It is already available in leading enterprise-class products.
In practice, AI-powered warehouse data analysis can include forecasting demand for individual SKUs based on sales history, seasonality and external market signals; dynamically optimising picking routes in real time according to the current distribution of products and the workload in each zone; and intelligent workforce planning, with the system recommending how many employees should work the next shift based on the expected volume of orders.
This is where the convergence of WMS, Business Intelligence and AI platforms can create the greatest value.
At IT Vision, we help manufacturing companies combine WMS data with production, quality and sales data within a single AI and Business Intelligence environment. This allows the intelligent warehouse to operate as part of a wider, integrated digital factory.
Frequently Asked Questions
What Is the Difference Between an ERP System and a WMS?
An ERP system manages the company’s overall business processes, including finance, sales, purchasing, manufacturing and human resources.
A WMS focuses specifically on physical warehouse operations: receiving goods, storage, picking and dispatch.
An ERP system answers the question: “What do we have and what is it worth?” A WMS answers: “Where exactly is it and how can it be collected as efficiently as possible?”
The two systems work most effectively when they are integrated through APIs.
Which Companies Benefit Most from a WMS?
A WMS generates the greatest return on investment for companies that process more than several hundred orders per day, operate across large facilities with thousands of storage locations, use multiple sales channels simultaneously or are required to track product batches and expiry dates.
The value of a WMS is particularly significant for manufacturing companies that manage warehouses for raw materials, semi-finished goods and finished products, as well as for e-commerce businesses and 3PL contract logistics providers.
Does Implementing a WMS Require Expensive Equipment?
Not always. SaaS-based WMS solutions can be used on standard Android tablets and smartphones, which are considerably less expensive than dedicated industrial terminals.
However, in demanding warehouse environments involving low temperatures, dust or intensive shift work, it may be worth investing in rugged industrial-grade data collection devices.
The cost of the equipment is usually lower than the benefits generated by greater operational speed and accuracy. The decision should therefore be based on an analysis of the total cost of ownership.
What Is Order Picking in a WMS?
Order picking in a WMS is an automated process in which the system generates an optimised route for the warehouse employee to collect products from the racks. It indicates the exact locations, quantities and collection sequence.
The employee confirms each collected item by scanning a barcode or RFID label. This prevents errors and provides the system with the information needed to update inventory levels in real time.
A WMS can support different picking methods, including picking individual orders separately, multi-picking several orders simultaneously and zone picking followed by consolidation.
What Are the Most Common Challenges When Implementing WMS Software?
The most common challenges associated with implementing a WMS include disorganised source data, such as the absence of a clear location structure or missing EAN codes; underestimating the time required for the initial stocktake and data migration; employee resistance to changing established working methods; and defining the scope of ERP integration too narrowly.
The success of the implementation largely depends on the quality of the process analysis conducted before the contract is signed. IT Vision treats this stage as an essential foundation of every project.
Implement a WMS with a Partner Who Understands Your Industry
Warehouse management is one of those areas in which poor decisions can be particularly costly. Their effects are immediately visible in shipping errors and dissatisfied customers, while their long-term costs continue to grow through inefficient processes and excessive dependence on experienced employees.
Implementing the right WMS — properly matched to the scale and characteristics of the operation — can generate one of the strongest returns on investment we see among our clients.
IT Vision specialises in implementing business management systems for manufacturing and distribution companies and operates as a certified Microsoft partner in the area of Dynamics 365 Business Central.
In addition to ERP solutions, we provide manufacturing companies with an extended portfolio of systems in cooperation with DSR, a provider of advanced MES, APS and WMS solutions designed for manufacturing environments.
Together, we create an ecosystem that manages both the flow of information and the physical flow of materials throughout the factory and warehouse.
To assess whether a WMS makes sense for your company and determine which type of system would be most appropriate, speak to our specialists. An initial needs analysis and discussion of the available options are free of charge and can help you avoid costly mistakes when selecting a solution.
Contact IT Vision — we will help you choose the right tools for your processes.
Director of the Implementation Department at IT Vision, with over 20 years of experience in delivering implementation and consulting projects for companies across various industries; a certified Microsoft Dynamics 365 expert and trainer with hands-on experience from more than 70 ERP system analyses and audits.
