SAP EWM. Displacement from picking to storage area. Idea & step-by-step implementation (with ABAP).

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SAP EWM. Displacement from picking to storage area. Idea & Step-by-step implementation.

This blog-post written in collaboration with ABAP-developer Victor Pupynin

Intro.

Typical warehouse layout contains next functional areas:

• Loading and unloading area
• Goods reception area or warehouse entrance area
• Repackaging area
• Warehouse quarantine area
• Sample selection area
• Storage area
• Picking area
• Order preparation area
• Warehouse technical area
• Warehouse administrative area

Problem solved in this blog-post related to Storage area and  Picking and order preparation areas.

So let's do a closer look to activity in it.

Look at collage photo. This is typical warehouse landscape.

Level 1 -  Picking area

Level 2 and higher  - Storage area

also in the foreground - Order preparation area

Typical business scenario:

1. ERP-operator create in ECC(or S/4HANA) and distribute to EWM Outbound delivery
2. EWM-operator:   

           2.1. Create wave

           2.2. Assign 1..N outbound deliveries  to created wave

          2.3.  Release wave

          2.4. SAP EWM creates WO/WT according to standard and customer-specific logic 

          2.5. One possible scenario:

if WT quantity > quantity in pallet at storage area: route for pallet is: Storage Area ->  Console -> Order preparation area

  If WT quantity < quantity in pallet at storage area. Route for pallet is: Storage area - > Picking Area - > partial aggregation through source pallet to target pallet - > Order preparation area

3.Work in the aisles looks as:

For upper tiers:

High Reach Forklift (Turret Trucks) Something like: Yale MTC10-15L, Hyster C1.0–1.5 or Jungheinrich ETR 230

Remove the pallet from the upper tiers (Storage area) and put it on the lower tier (Picking area) or Console

4.Work at the Console looks as:

Forklift something like Jungheinrich EFG 213

Remove the pallet from Console and put it on the Picking area

1. Work at the lower tier looks as:

Workers with trolley "Rocla" carry out the picking process in Picking area. They are partial repack stock from source pallet to target pallet and move target pallet to order preparation area

Hydraulic "Rocla" trolley  Authors photos.

Business problem.

Possible problem on Step 2.3.

For a lot of reasons situation when all storage bins at a picking area are full can be occurred.

At this case:

Wave Release status - (E) Error

EWM-operator at warehouse  wind-up face-to-face with not easy to understand wave release log.

Resolution

Create automatic displacement from picking to storage area manually and during wave release.

Possible sequence (manually via custom report) :

Step 0. Auxiliary table.

ZLGTYP_ROLE - Lgtyp Role (Storage, Transit, Picking, etc).

LGTYP_PICK - Relation between storage and picking area.

Step 1. Selection screen

Options:

Range of Outbound deliveries.

Range of Waves.

Range of planed GI dates.

Ideas for Screen implementation - selection_screen_1.abap

main.abap

selection.abap

Step 2. Logic for Scenario when all fields on selection screen on Step 1 were empty.

Select all Outbound deliveries without GI from the period from STVARV variable.

Ideas for selection from STVARV variable -  stvarv.abap

Step 3.  Get items Outbound deliveries according to the criteria defined in the Steps 1,2

Idea for Get Outbound deliveries according Range of Waves - get_wave.abap

Ideas how  Get items from Outbound deliveries according Range of Outbound deliveries - get_delivery_item.abap

Step 4. Divide items from Outbound deliveries from Step 3 into 2 Lists

List 1.  Item with batch.

List 2.  Items without batch.

Idea for Divide implementation - divide_into_2_lists.abap

Step 5. Get available stock for items from Outbound deliveries reсeived on Step 4

Idea for implementation - 

get_stock_for_wt.abap

get_available_stock.abap

Step 6. Remove bins with open warehouse tasks or under inventory from List received on Step 5

Idea for implementation -

get_stock_for_wt.abap

get_stock_for_wt_class.abap

Step 7. Get bins in picking  area for displacement.

Idea for implementation - Displacement/get_displacement_bins.abap

Step 8.  Create warehouse tasks for displacement for Stock/bins received on Steps 7 and 8

Idea for implementation -  create_tasks.abap

Testing.

Prerequisite: Outbound delivery crated and integrated from S/4HANA to EWM.

Transaction /SCWM/WAVE

Assign Outbound Delivery (Warehouse Requests)

Available Stock. HU located at the storage area.

Storage Bin at Aisle 01

No Empty (or not blocked) storage bins.  Displacement inevitably.

Deplanement in action.

Conclusion.

Approach for displacement from picking to storage area was provided.