WMS — Warehouse Management System
WMS (Warehouse Management System) manages the day-to-day operations of a physical warehouse: stock locations, picking routes, replenishment, receiving, putaway, inventory counts, and operator productivity. Where the ERP knows what is in stock at a high level (item, quantity, plant), the WMS knows exactly where each unit is (aisle, shelf, bin) and how it should move through the facility.
Core WMS functions
- Storage location management: aisles, shelves, bin locations with capacity and dimension tracking
- Putaway optimisation: storing incoming goods at optimal positions based on item characteristics and turnover rates
- Picking strategies: single-order, batch, zone or wave picking depending on order patterns
- Inventory counts: cycle counting, blind counts, ABC-based count frequency
- Labour management: operator productivity, task assignment, performance tracking
- Yard management: dock allocation, truck scheduling, trailer tracking
ERP-native vs specialist WMS
The ERP-native warehouse module (SAP EWM, Microsoft Dynamics 365 SCM Warehouse, abas Warehouse, NetSuite Warehouse) is sufficient for most mid-market operations up to 10,000-20,000 SKUs in 1-2 sites with manual or semi-automated workflows. Specialist WMS (Mecalux Easy WMS, viadat, KNAPP KiSoft, Manhattan, SSI SCHAEFER WAMAS) becomes valuable above this scale: multi-site, high-automation, or e-commerce 3PL with very high throughput. Implementation cost: 50,000-200,000 EUR for ERP-native vs 200,000-2,000,000 EUR for specialist WMS including hardware integration.
Vendors in the German-speaking market
Strong DACH WMS players: SSI SCHAEFER (Neunkirchen, integrated with automation), KNAPP (Hart bei Graz, AT), viadat (Aschaffenburg), Inconso (now part of Körber), PSI Logistics (Berlin), Mecalux Easy WMS (Spanish vendor with DACH presence). For pure ERP-native: SAP EWM dominates upper mid-market; Microsoft Dynamics 365 SCM Warehouse is common in distribution; abas has strong embedded WMS for manufacturing.
Related Topics
Frequently Asked Questions
When do I need a specialist WMS instead of the ERP module?
Switch criteria: more than 10,000-20,000 active SKUs, more than 1,000 picks per day per operator, multiple warehouses with cross-site stock optimisation, integration with AS/RS or AGV automation, or e-commerce/3PL with hundreds of thousands of order lines per month. Below these thresholds, the ERP-native warehouse module saves integration cost and master-data duplication.
Can a small e-commerce business get by without WMS?
Up to roughly 50-100 orders per day, paper picking lists from the ERP with manual barcode scanning are sufficient. Above that, the ERP's mobile warehouse app or a lightweight WMS add-on (Pickware for Shopware, weclapp's mobile-WMS) starts paying off. Pure specialist WMS rarely makes sense below 500 orders per day unless the warehouse is highly automated.
What does a WMS implementation cost?
ERP-native WMS module: 30,000-100,000 EUR for typical mid-market manufacturing or distribution. Specialist WMS standalone: 150,000-500,000 EUR for mid-volume operations, 500,000-2,000,000 EUR for high-automation logistics centres. The cost split is roughly 30% software, 50% implementation services, 20% hardware (scanners, terminals, network).