The interaction between logistics processes, WMS logic, and physical warehouse layout

How do you design a warehouse based on your processes and WMS logic, and to what extent does the WMS determine the physical layout of the warehouse?

When designing a warehouse, attention often goes first to the building: how many square meters are available, how many pallet locations are needed, and which racking systems fit in the space? Understandable, but is this actually the right starting point?

A warehouse is much more than just a storage space. It is an interaction between logistics processes, employees, system logic, and physical layout. The real challenge, therefore, is not just how you build the warehouse, but above all how processes, WMS, and layout reinforce one another.

The central question, then, is: Do you first design the warehouse and then adapt the WMS afterward, or do you start from the processes and WMS logic?

When the physical layout takes the lead

In many projects, the design begins with the physical space. This includes the layout, racking, aisle widths, docks, and mechanization. As a result, the physical flow automatically becomes leading. The consequence is often that the WMS has to adapt to the building’s limitations. The system then mainly supports the operation administratively, instead of actively controlling and optimizing them.

A good example is a narrow-aisle warehouse in an existing building. In this type of warehouse, traffic is often one-way, with only one truck allowed in each aisle at a time. As a result, pick routes are built per aisle and a two-step process often emerges, in which, for example, a reach truck supplies or removes the pallets, while a narrow-aisle truck handles storage or order picking.

In this situation, the physical layout of the warehouse determines the way both the system and the work are carried out. Because of the limitations of the space, employees and vehicles are forced to work in a specific way, which leaves less flexibility in process execution. As a result, not only do planning and control from the WMS have less room for optimization, but the emphasis is primarily on adhering to the physical constraints of the warehouse.

This approach often works perfectly well in practice in the short term, but it limits flexibility and scalability in the longer term.

When processes and WMS take the lead

The other approach, is fully process- and system-driven. In this case, the logistics processes are designed first, and the WMS is then configured based on best practices.

Examples include dynamic slotting, smart replenishment logic, advanced pick strategies, or real-time control of warehouse activities. In theory, this results in highly efficient warehouse processes. But here too there is a risk: WMS processes may be perfectly designed, while the physical environment does not support them.

Dynamic slotting is a good example. With fixed locations, products have a permanent place in the warehouse, whereas with dynamic locations, the WMS determines where goods are stored based on availability and efficiency. For example, the WMS may automatically decide that fast-moving items should be placed closer to the shipping area to minimize walking distances. But if the warehouse has racks with limited heights or load capacities, those ideal pick locations may turn out to be physically unusable. Employees then fall back on old working methods, and the WMS logic loses its value.

A smart system alone is therefore not enough.

When physical reality determines the WMS

In some situations, it is simply not possible to completely redesign processes or layouts. This is especially true for brownfield projects, existing buildings, older ERP systems, or operational environments that must continue running without interruption.

In these situations, the WMS tends to follow rather than lead. Physical reality then determines which processes are feasible and which WMS functionalities can actually be used. This does not mean that optimization is impossible but it does mean that choices have to be made in a more realistic and pragmatic way.

The right sequence for warehouse design

In successful warehouse projects, you usually see the same logical sequence.

1. Order profiles and service Levels

The first step is to gain insight into the order flows within the warehouse. Through data analysis, various aspects are examined, such as the type of orders (e.g., large, small, complete, or partial deliveries), the spread of orders over the day, week or seasons, and the moments when peak loads occur. In addition, it is important to analyze the turnover rate and consumption of products, so that it becomes clear which items move quickly, which remain in storage longer, and what type of pick location is required.

The desired service levels also play a crucial role.  This includes delivery times, delivery reliability and customer expectations. By analyzing these elements together, a complete picture emerges of demand patterns and performance requirements, which is essential as the basis for further process and warehouse design.

2. Logistics Processes

In this step, the entire journey of goods through the warehouse is mapped out, from receipt through to final shipment. This includes looking at how goods arrive, are processed, and then assigned a location within the storage structure. From that storage, depending on demand, they are replenished to the appropriate locations to support the order picking process.

Next, the focus is on how orders are picked, combined, and prepared for further handling, after which they are ultimately made ready for transport to the customer. By analyzing this entire process as one coherent whole, insight is gained into the flow of goods and the interdependencies between the different activities within the warehouse.

3. WMS Logic

It is only at this stage that the logic within the WMS is configured. The WMS logic translates the operational processes into the way the system controls the warehouse. Choices are made here about how goods are assigned, moved, and picked, and how inventory and work are managed. The focus is mainly on defining the rules and principles that determine how the system supports and optimizes day-to-day operations within the logistics process.

4. Physical Layout

Once the processes and the associated system logic are clear, the physical layout of the warehouse is designed. In this phase, it is determined how the space can best be used to support the chosen workflow. This involves the layout and implementation of elements such as storage structures, walking and driving routes, functional zones, and buffer areas.

The layout of the loading and unloading areas and the extent to which automation is implemented also play an important role here. The goal is to create a physical environment that facilitates operational processes as effectively as possible and aligns with how the system and the organization intend to carry out the work.

Conclusion

You do not design a warehouse based solely on the building, nor solely on the system.

The best results are achieved when logistics processes, WMS logic, and physical layout are developed simultaneously.

Usually, this is a partly iterative process:

• processes are leading
• WMS logic provides structure
• physical layout is supportive

Or, in other words:

The system must support the processes, not the other way around.

July 2026

Petra de Boer, Senior Consultant

** This article was published on consultancy.nl and warehousetotaal.nl on 30 July 2026 (in Dutch) **

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