Sometimes you need to indicate that several products are a result of a work order. These products can be:
| • | Co-product: Usable product, automatically generated during the production of the main product. |
| • | By-product: A product that occurs incidentally or undesirably during the manufacturing of the main product. |
| • | Dismantling: Disassembly of assemblies and return of components to stock. |
In these cases, the BOM quantity is entered as a negative entry.
Negative BOM quantity behavior
Procedure or module |
Negative Bom quantity is treated as |
|---|---|
Order recommendations |
Planned receipts. |
Backflushing |
Posted automatically or manually. |
Displayed in the same color as assemblies but with another icon. Displayed positive (as receipt). |
|
Posting |
Manually, backflushed or posted in via collective receipt. See Collective receipt. |
Merging work orders |
Individual receipts are inserted as negative BOM items and posted correctly to the WIA account. |
Sales order |
Negative items can be reserved for sales orders. |
Pre-calculation |
Valued according to Configuration wizard > Precalculation > Value negative quantity. |
Post-calculation |
Valuation based on post-calculation is not possible. |
A Bill of materials position can be a sub-assembly with own Bill of materials list and Routing position.
How to manage this in the areas:
|
Configuration example for disassembly:
For disassembly there is no main product. Use a service item (not storage related) and define the resulting products in the BOM. Expected quantities are entered as negative.
Service item
|_ Product 1
|_ Product 2
Configuration example for a by-product:
For by-products indicate a main product on top level. This way you can work with offcut and reuse waste material.
Main item
|_ Material
|_ By-product