A storage type is a physical or logical subdivision of an SAP EWM warehouse complex. It can represent a high-rack reserve area, bulk storage, a fixed-bin picking zone or another area with a distinct warehouse function. One storage type contains storage bins; storage sections may group similar bins within it. The type helps express warehouse characteristics and process rules, while stock is ultimately tracked at the relevant location level.
Do not confuse a type with a bin
A warehouse number defines the larger EWM complex. Within it, a storage type classifies a facility or operational zone. A storage bin provides the exact address of stock. Storage sections may subdivide a type to group bins with common traits, and activity areas can group bins for operational work. A consultant needs these distinctions because a picking failure could stem from a bin attribute, type strategy or the assignment of task areas.
Physical and logical types solve different problems
A reserve high-rack area is a recognizable physical example. Other types may express functional steps such as staged goods or handling workflows. The model must reflect what exists physically while also supporting planned warehouse execution. SAP documentation describes both physical and logical subdivisions. Some installations use storage types or storage arrangements differently depending on version and configured processes; validate the implementation rather than treating one sample list as universal.
Example: reserve stock and forward picking
A wholesaler keeps palletized cartons in high racks and small picking quantities in a nearby forward-pick zone. High-rack storage needs equipment access and capacity controls. The forward area needs short pick travel and reliable replenishment. Separating the areas into suitable types can make physical constraints and warehouse strategies easier to manage. It does not mean that every relocation is automatic without the required master data and configuration.
Why search and capacity rules matter
The putaway process must direct incoming stock to a suitable position. Depending on the process, the system may consider location attributes, capacity, stock category, material characteristics and search behavior. Storage type configuration can carry relevant controls, but that configuration must match actual handling limits. Poorly designed type settings may cause blocked tasks, unsafe placements or misleading stock availability.
Use sections only where they add meaning
Storage sections can group positions for fast versus slow movers, heavy material or another local characteristic. SAP's Storage Section documentation notes that a section is not universally required for every type; necessity depends on the controls and search design used. Teams should add a section when it supports a real operational decision, not because the hierarchy diagram shows an optional box.
Exceptions reveal a weak design quickly
Walk through oversized goods, hazardous restrictions, mixed pallets, empty bins, blocked aisles, counting during operations and temporary staging. Verify how operators recognize and resolve the exception. When a designed type causes repeated manual workarounds, investigate the underlying capacity, product and process assumptions before adding another workaround.
Discovery questions for implementation
Which areas differ in equipment, capacity, handling sequence or picking behavior? What stock types can safely share a zone? Which storage sections genuinely help putaway? What happens when a preferred zone fills up? How will replenishment and physical inventory work across the boundary? A good EWM design is one supervisors can explain using their real warehouse map.
Related Knowledge
EWM Organizational Structure · Warehouse Number · Yard Management Basics · Labor Management Basics. Explore SAP EWM.