1. Environment Intake (Critical)

Data flow:

MM/SD document (MKPF/VBEP) → Warehouse Order (/SCWM/OI...) 
  ↓
RF/Web worker executes → Confirmation
  ↓
Post goods receipt/issue back to MM/SD (MKPF/VBEP updated)

Decentralized EWM (complex networks)

Separate EWM system (own database, own S/4HANA or legacy) manages warehouse. Multiple plants connect.

Use when:

• 3PL outsourced warehouse (external operator)
• Multi-region distribution (each region own WH system)
• Existing legacy warehouse system to preserve

Challenge: ALE/IDocs for MM/SD ↔ EWM synchronization

3. Warehouse Structure & Master Data

Warehouse Configuration (/SCWM/MIGO_SAC or /SCWM/INIT)

Key Difference from WM

4. Inbound Processing (Goods Receipt → Putaway)

Complete Flow

1. Purchase Order (ME21N) confirmed
2. ASN (Advanced Ship Notice) sent by vendor
   - Optional but recommended (enables automatic dock assignment)
3. Create Inbound Delivery (/SCWM/CREATE_INBOUND or auto from PO)
   - Assigned to receiving dock / gate
4. Goods arrive → Create Inbound Order (/SCWM/TRAD)
   - Automatically triggered OR manual
5. RF worker scans items, verifies quantity/quality
   - If quality issue: quarantine bin, hold for inspection (/SCWM/QUAD)
6. Confirm goods receipt → moves to putaway queue
7. Putaway wave created (automatic or manual batch)
8. RF worker executes putaway → bins stock according to putaway rule
9. Stock available for picking (same or next day)

Key Transactions

Tables

Inbound Order Header (/SCWM/ORDICT):

• LGNUM: Warehouse
• ORDERID: Inbound order number (auto-generated)
• STATUS: 01=created, 02=ready-to-execute, 03=in-execution, 04=completed

Warehouse Order (/SCWM/ORDIM_*):

• ORDIM_O (outbound header), ORDIM_C (confirmation)
• Task type: 01=pick, 02=pack, 03=putaway, 04=transfer, 05=count

Putaway Strategy

Unlike WM (LS0N), EWM uses Putaway Rules (customizable ABAP exit).

Standard putaway logic:

1. Fixed bin: High-value A-items (configured in material master)
2. Slotting: AI-driven optimal bin assignment (distance, capacity)
3. FIFO/LIFO: Material master setting (FIFO typical for perishables)
4. Consolidation: Add to existing partial quantity if space allows
5. Next empty: Default fallback

Configuration: CUSTOMIZING → (cross-module integration) → Warehouse Management → Inbound Processing → Putaway

Issue: "Goods received but not moving to putaway"

Root Cause: Putaway wave not created, or quarantine hold active Check:

• /SCWM/MON → filter by warehouse → check "Warehouse Orders" pending putaway
• /SCWM/IQUANT → quarantine active? If yes, QC must release
• /SCWM/WAVE → putaway wave exist for this receipt date?

Fix:

1. /SCWM/WAVE → create putaway wave manually
2. /SCWM/IQUANT → release from quarantine if ready
3. /SCWM/MON → monitor RF execution (worker must scan & confirm)

5. Outbound Processing (Picking → Packing → Shipping)

Complete Flow

1. Sales Order (VA01) created
2. Outbound Delivery (VL01N) created → Warehouse Order auto-created
3. Picking wave created (/SCWM/WAVE)
   - Consolidation: group multiple orders for multi-pick (efficiency)
4. RF worker picks items per warehouse order (pick + confirm)
   - Staging area: items held until all picks complete
5. Packing task assigned (/SCWM/PACK_MONITOR)
   - Box/pallet assignment
   - Weight/dimension verification
   - Handling Unit (HU) creation
6. Shipping label printed (barcode, address)
7. Post Goods Issue (VF01) → PGI document updates inventory
8. Invoice created → delivery closed

Wave Management (/SCWM/WAVE)

Purpose: Group multiple outbound orders into a single picking wave.

Wave types:

• Consolidation wave: Multiple customers, same delivery date → Multi-pick efficiency
• Zone-based wave: All items in zone 1, then zone 2 (minimize RF movement)
• Batch wave: Time-based (e.g., all orders between 08:00–10:00)
• Route-based wave: Group by customer route (if using TM — Transportation Mgmt)

Configuration: /SCWM/WAVEDEF (wave definition template) → trigger settings (time, qty, manual)

Packing (/SCWM/PACK)

Handling Unit (HU) = container (box, pallet, carton)

HU structure:

Outbound Order (SO line items)
  ↓
Warehouse Order (pick tasks)
  ↓
Handling Unit (container)
  ├─ Item 1 (qty X)
  ├─ Item 2 (qty Y)
  └─ Item 3 (qty Z)

Label printing: Integrated with label printer (ZPL format typical)

Issue: "Picking complete but delivery not ready to ship"

Root Cause: Packing not completed, or HU weight verification failed Check:

• /SCWM/PACK_MONITOR → all items packed into HU?
• /SCWM/HU_WEIGH → weight variance flagged? (system blocks if tare ±10% diff)
• /SCWM/MON → warehouse order status: completed picking but not packed?

Fix:

1. /SCWM/PACK_MONITOR → pack remaining items
2. /SCWM/HU_WEIGH → confirm weights (or override if acceptable variance)
3. /SCWM/STAGE → move HU to shipping staging
4. VF01 → post goods issue (MM updated, available for invoice)

6. RF Framework (/SCWM/RFUI)

EWM uses Web-based RF (HTML5), replacing the legacy proprietary RF in WM.

Key Advantages

RF Transaction Types

Configuration

RF Menu Customization (/SCWM/RES01 → Resource Profile):

• RF verification profile: Strictness of scanning (batch/serial required? etc.)
• User authorization: Which RF transactions available per worker role
• Task assignment: Automatic vs manual queue pull

Issue: "RF worker can't see assigned task"

Root Cause: Task not assigned to worker's queue, or authorization blocked Check:

• /SCWM/MON → filter by worker → any tasks pending?
• /SCWM/RES01 → worker resource profile → RF transaction authorization active?
• /SCWM/RFUI → worker logged in? Correct warehouse assignment?

Fix:

1. /SCWM/MON → manually assign task to worker (if system assignment failed)
2. /SCWM/RES01 → update authorization profile
3. /SCWM/RFUI → worker re-login (clears cache)

7. Physical Inventory in EWM (/SCWM/PI)

EWM inventory leverages quant-level detail (batch, serial, shelf-life).

Cycle Counting (Standard)

1. /SCWM/PI_SELECT → Define scope (warehouse, zones, materials)
2. /SCWM/PI_CREATE → Generate PI docs → Print count sheets
3. RF worker scans quants, records qty → /SCWM/RFUI (PI task)
4. /SCWM/PI_POST → Post differences (generate MM doc)
5. Report variances → investigate root cause

Continuous Inventory (24/7)

Workers scan every outbound/inbound transaction. System calculates variance in real-time.

Activation: Customize → Warehouse Management → Physical Inventory → Continuous Mode = X

Key Difference: EWM PI vs WM PI

Issue: "PI shows significant variance, batch split across bins"

Root Cause: Multiple putaway rules scattered same batch (inefficient consolidation) Check:

• /SCWM/QUANT (table browser) → filter material + warehouse → count bins
• /SCWM/PI_POST → check variance report by batch/bin

Fix:

1. Create consolidation TO (transfer to single bin)
2. Update putaway rule to consolidate same batch
3. Re-run cycle count

8. Resource Management (Workers, Equipment, Labor)

EWM includes labor allocation & capacity planning — not available in WM.

Resource Types

Labor Management (/SCWM/LABOR)

Track actual vs planned labor hours.

Use cases:

• Forecast labor need (peak season: 20 workers, normal: 12)
• Monitor productivity (items per worker per hour)
• Adjust task assignment (prioritize fast-movers to experienced workers)

Yard Management

Vehicles in queue for loading/unloading.

9. EWM-TM Integration (Warehouse → Transportation)

TM (Transportation Management) optimizes shipping routes & consolidates shipments.

Data Flow

Warehouse (EWM)
  ↓
Create Shipment (Handling Units ready)
  ↓
TM: Carrier assignment, route optimization
  ↓
Dock schedule assignment
  ↓
Freight booking, label printing
  ↓
Handoff to carrier (EDI-850, EDI-810)

Key T-codes (TM side)

10. Embedded EWM vs Decentralized EWM vs WM

Deployment Comparison

11. ECC WM → S/4HANA EWM Migration

Pre-Migration Checklist (12 months before cutover)

• Document warehouse structure (zones, bins, resources, capacity)
• Audit WM customizations (ABAP exits, reports) → map to EWM equivalents
• Plan RF terminal strategy (web-based rollout, device selection)
• Prepare data migration (quants, batch/serial records)
• Design putaway/picking rules in EWM (NOT 1:1 from WM)
• Identify process changes (wave picking, yard management new)
• Budget for retraining (WM staff → EWM operators)

Key Warnings

Process redesign required:

• WM: TR → TO → manual override common
• EWM: Warehouse Orders auto-created, wave consolidation expected

RF retraining:

• WM: Device-specific (Symbol, Zebra proprietary menus)
• EWM: Web-based (same UI across all devices, but new workflows)

Custom code:

• WM programs using LQUA, LTAK, LTAP must rewrite for /SCWM/* tables
• Function module LFEI_..., LTAK_..., LTAP_... have no direct EWM equivalent

Fallback plan:

• Parallel run 1-2 months (both WM and EWM active, separate ware houses)
• Cutover date: freeze WM, go-live EWM
• Rollback: keep WM DB snapshot, revert if critical issues

12. Korean Logistics Context (한국 현장)

Typical EWM Setup: Korean E-commerce / 3PL

Warehouse automation:

1. Automated Sortation System (Sorter): Coupang, GMarket (integrates with EWM picking)
2. Conveyor belt: Item movement between zones (putaway, pick, pack)
3. Barcode/RFID: Universal (all items labeled before warehouse entry)
4. RF+Web hybrid: Worker app on personal phone + warehouse display system

Example: Korean Fulfillment Center (Coupang-style)

Warehouse "DFC" (Daegu Fulfillment Center):

Inbound Zone (receipt):
  ├─ Gate 1, 2, 3 (truck dock)
  ├─ QC area (damage inspection)
  └─ Sort carousel → zones A, B, C

Storage Zones:
  ├─ Zone A (fast movers, high-velocity items)
  ├─ Zone B (medium velocity)
  └─ Zone C (slow movers, bulky items)

Picking Zone:
  ├─ Wave 1 (08:00–11:00) → multi-pick consolidation
  ├─ Wave 2 (11:00–14:00) → same
  └─ Wave 3 (14:00–17:00) → same

Packing Zone:
  ├─ Manual packing (small items)
  ├─ Automated wrapper (large items)
  └─ Label printer → Shipping dock

Resource:
  ├─ 100 RF workers (morning shift)
  ├─ 10 Sorter operators
  └─ 5 QC inspectors

Integration:
  ├─ Inbound: Vendor ASN → EWM → Sorter
  ├─ Outbound: Sales Order → EWM Wave → Sorter → Packing → TM
  └─ Reporting: Real-time KPI (items/hour, accuracy%, variance%)

한국 고유 규정:

• 개인정보보호 (개인정보보호법): 배송 정보 암호화 필수 → RF시스템 보안 설정
• 택배 추적: TM 연동으로 고객에게 실시간 배송 상태 제공
• 아이템 추적성 (Traceability): 배송 시 각 item barcode 스캔 필수 (분실 방지)
• 반품/교환: 별도 반품센터 with separate EWM warehouse (same instance, different warehouse)

13. Standard Response Format

For EWM questions, use Quick Advisory mode:

Format: Issue → Root Cause → Check (/SCWM T-code + table) → Fix → Prevention → Related

Example:

Issue: "Putaway RF task shows zero picks available"

Root Cause: Inbound order not yet released from quarantine QC hold, OR putaway wave not created

Check:

• /SCWM/MON → filter warehouse + status = putaway pending
• /SCWM/IQUANT → any quarantine holds active?
• /SCWM/WAVE → putaway wave exist for this inbound date?

Fix:

1. /SCWM/IQUANT → QC release quants (if inspection complete)
2. /SCWM/WAVE → create putaway wave manually (if auto-creation disabled)
3. /SCWM/MON → monitor RF execution (worker must scan & confirm)

Prevention: Enable automatic wave creation (CUSTOMIZING → Warehouse Mgmt → Inbound → Auto Wave)

Related: See section 4 (Inbound Processing) for full workflow.

14. Key References

Primary Tables (/SCWM prefix):

• /SCWM/WHSC: Warehouse master
• /SCWM/WOTY: Warehouse process type (zones)
• /SCWM/BINLOC: Storage bin / location
• /SCWM/QUANT: Stock holder (batch, serial, shelf-life)
• /SCWM/ORDIM_*: Warehouse order (header, items, confirmation)
• /SCWM/ORDICT: Inbound order header
• /SCWM/RESRC: Resource (worker, equipment, gate)

Key T-codes (Monitoring / Execution):

• /SCWM/MON: Warehouse Order monitor (central dashboard)
• /SCWM/WAVE: Wave management (picking, putaway consolidation)
• /SCWM/RFUI: RF terminal (worker entry point)
• /SCWM/PACK_MONITOR: Packing execution
• /SCWM/PI_CREATE: Physical inventory
• /SCWM/YARD: Yard management (dock scheduling)
• /SCWM/GATE_ASSIGN: Gate assignment (inbound/outbound docks)

Configuration Paths:

• CUSTOMIZING → Warehouse Management → Master Data → Define Warehouse
• CUSTOMIZING → Warehouse Management → Processing → Inbound / Outbound / Putaway Rules
• CUSTOMIZING → Warehouse Management → RF → RF Transaction Authorizations

SAP Resources:

• SAP Help Portal: help.sap.com (EWM 2020+)
• Note 1863880: EWM release notes
• Note 2685701: EWM vs WM migration guide

15. Troubleshooting Quick Links

Last Updated: 2025 | Platform: S/4HANA only | ECC WM: See sap-wm skill (sunset 2025)