1. Production Data: If it is a finished good or a component of a BOM, then remove BOM, remove assignment to Routing/Master Recipe, delete production versions. Delete any process/production orders or complete then and set status to TECO.
2. Purchasing: the deletion flag must be set in all current and old purchase orders and purchase info recs. Delete entries in source lists, contracts and outline agreements.
3. QM: Make UD on outstanding inspection lots.
4. Planning Data: Delete any forecasts or planned independent requirements or SOP/Flexible planning plans.
5. Sales: Cancel or complete the process for any sales documents (eg orders, deliveries). Remove or disable pricing records.
6. Warehouse Management: Cancel or complete transfer orders, transfer requirements, posting change notices. Ensure that no negative bin stock exists that cannot otherwise be balanced by other positive bin stocks.
7. Physical Inventory: Delete old, obsolete (but still active) physical inventory documents. Post Count, Adjust and close documents, or delete item from active documents.
8. Record previous period stock for the plant (MM03-Accounting). If non-zero then record details by batch and storage location (table MCHBH if using release > 4.0a).
9. You must remove previous period stock - the previous period in both MM and GL may need to be reopened (or wait until month-end processing when both previous and current periods are open simultaneously). To remove you need to use a transaction such as MI10 or MB1C and use a posting date of the previous period.
10. You must remove any remaining current period stock.
11. Planning Data (cont'd): delete all planned orders. Delete MRP List if any (check with MD05).
12. Costing: Delete any cost estimates.
13. Legacy Systems / Interfaces: Check what impact the change will have.
14. Material Master preparation:
* Ensure no alternative unit of measures are being used on the sales / purchasing / work scheduling / plant storage 1 views.
* Remove all alternative UoMs from "Extras"
15. CHANGE THE BASE UNIT OF MEASURE. If any errors, then check above steps again.
16. Material Master:
* Modify Planned Price 1, standard cost and/or moving average price on costing and accounting views.
* Modify any unit-related fields eg gross/net weights, MRP lot sizes / safety stock
* Re-create any alternative units of measure and re-assign to correct material master views.
17. Recovery: If you need any of the orders or master data deleted in any of the above steps, then now is the time.
18. Re-enter stock. Do not attempt to add back into previous period especially if using moving average price control (V) - do not back-date.
I think you would have change your opinion after reading all these steps, better is to create a new product.
