Configuring Putaway Strategies: Storage Type Search and Bin Determination

Explanation

Once the business purpose of putaway is understood, the next step for a consultant is configuring the rules that actually determine where stock goes. In classic ECC WM, putaway configuration centers on the storage type search sequence assigned to a warehouse number and movement type combination. Each storage type in the sequence carries a putaway strategy indicator (such as addition to existing stock, next empty bin, fixed bin, or bulk storage) that governs how the system selects a specific bin within that storage type. The system evaluates the search sequence in priority order: if the first storage type in the sequence cannot accommodate the quantity (e.g., no empty bin matching the strategy), the system moves to the next storage type in the sequence, and so on, until a bin is found or the process ends in an error requiring manual bin assignment. In Embedded and Decentralized EWM, the equivalent logic is more layered. Putaway control is driven by a combination of the storage type's putaway control indicator, storage section indicators, and activity area assignments, layered with putaway strategies similar in concept to WM (stock removal-aware putaway to consolidate with existing stock, bulk storage by quantity/capacity, fixed bin assignment per product, and putaway near a picking location for slow movers). EWM's determination also incorporates the warehouse product master's storage type indicators and, where configured, layout-oriented storage control for pick-and-pack scenarios. The key structural difference from WM is that EWM works with warehouse tasks (WTs) generated against the delivery's putaway requirement, rather than transfer orders, though the conceptual sequence of storage type search remains similar. A critical configuration dependency across all deployment options is master data completeness: bins must exist with correct type/capacity attributes, storage type indicators must be maintained on the product/material master (per warehouse), and unit-of-measure and packaging data must align so the system can evaluate whether a bin can physically hold the incoming quantity. If any of these are incomplete, putaway determination either fails outright (generating an error requiring manual intervention) or produces a technically valid but operationally poor bin assignment (e.g., splitting a pallet across two bins unnecessarily). Strategy selection should reflect realistic inbound patterns. For example, 'addition to existing stock' strategies are appropriate for fast movers with frequent smaller receipts, since they consolidate stock and reduce total bin usage. Fixed bin strategies suit materials with a stable pick face, common in manual picking areas. Bulk storage strategies suit palletized full-load receipts of a single material stored in floor locations. Mixing these strategies incorrectly, such as applying fixed bin logic to highly variable-volume seasonal products, causes recurring capacity conflicts and re-slotting overhead. Testing the search sequence requires simulating multiple realistic inbound scenarios: partial pallet receipts, full pallet receipts, receipts exceeding a single bin's capacity, and receipts of materials with no prior stock (first-time putaway). Each scenario should be traced through the configured sequence to confirm the resulting bin assignment aligns with warehouse layout expectations, not just that the transaction completes without error. Consultants should also verify what happens when no strategy resolves an assignment — whether the system creates an exception for manual bin decision, or whether the process halts entirely, since this affects operational procedures for warehouse staff during go-live and steady-state support. Deployment-specific note: in S/4HANA Cloud public edition, the depth of custom storage type search sequence configuration may be limited to what is exposed through scoping and configuration apps; consultants should verify available configuration scope rather than assume full on-premise EWM configuration flexibility is available.

Code example

* Illustrative ECC WM configuration concept (not an actual transaction script):* Storage Type Search Sequence for Warehouse Number 100, Movement Type 101* Sequence Storage Type   Putaway Strategy* 01       PICK-AREA-01    Addition to existing stock* 02       BULK-FLOOR      Bulk storage (quantity-based)* 03       HIGH-RACK       Next empty bin** Logic (conceptual, not literal code):* IF material has existing open stock in PICK-AREA-01 AND capacity allows*    THEN assign additional quantity to same bin* ELSE IF BULK-FLOOR has capacity for full pallet quantity*    THEN assign to next available bulk bin* ELSE IF HIGH-RACK has an empty bin matching unit load*    THEN assign to next empty bin* ELSE*    raise exception for manual bin assignment

Real project scenario

During a retail distribution center rollout, the project team configured a storage type search sequence that prioritized bulk floor storage before high-rack storage for a category of seasonal furniture items. During peak season, floor capacity was exhausted mid-shift, and the system began routing overflow to high-rack bins that were not sized for the furniture's dimensions, causing repeated putaway exceptions and manual overrides by supervisors. The fix involved adding an intermediate storage type in the sequence sized appropriately for overflow, plus a capacity threshold review before the next peak season.

Common mistakes

• Configuring a single generic search sequence for all material types instead of differentiating by storage type indicator or material group. • Not testing putaway strategies against realistic partial and oversized receipt quantities before go-live. • Overlooking unit-of-measure or packaging data gaps that cause capacity checks to fail silently or inconsistently. • Assuming the search sequence order alone determines efficiency without validating actual bin capacity and layout suitability. • Not defining a clear manual fallback procedure for putaway exceptions, leaving warehouse staff without guidance when automatic determination fails.

Best practices

• Differentiate storage type search sequences by material classification rather than applying one sequence warehouse-wide. • Validate master data completeness (bin capacity, storage type indicators, UoM/packaging data) before testing strategies. • Simulate partial, full, and oversized receipt scenarios during testing, not just standard-case transactions. • Define and document manual fallback procedures for putaway exceptions before go-live. • Review search sequence and capacity assumptions periodically, especially before seasonal or promotional volume peaks.

Interview angle

Candidates should be able to explain how a storage type search sequence resolves a bin assignment step by step, including what happens when the first storage type cannot accommodate stock, and articulate the structural difference between WM's transfer-order-based execution and EWM's warehouse-task-based execution. Interviewers frequently probe whether candidates understand that strategy selection must be tied to real material behavior (fast mover vs. bulk vs. fixed bin) rather than applied generically.