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
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Negative Bom quantity is treated as
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Order recommendations
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Planned receipts.
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Backflushing
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Posted automatically or manually.
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Work order structure
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Displayed in the same color as assemblies but with another icon.
Displayed positive (as receipt).
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Posting
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Manually, backflushed or posted in via collective receipt. See Collective receipt.
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Merging work orders
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Individual receipts are inserted as negative BOM items and posted correctly to the WIA account.
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Sales order
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Negative items can be reserved for sales orders.
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Pre-calculation
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Valued according to Configuration wizard > Precalculation > Value negative quantity.
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Post-calculation
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Valuation based on post-calculation is not possible.
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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:
Procedure or module
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Result
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Pre-calculation
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Bill of materials defined as receipt (negative costs)
Valued according to Configuration wizard > Precalculation > Value negative quantity.
Routing positions cannot produce negative costs. These are always zero.
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Post-calculation
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Planned cost:
Bill of Materials: negative costs
Routing position: zero
Real costs:
Bill of Materials: Sum of all transactions
Routing position: Sum of all time receipts. Can be only positive.
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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
Help URL: https://help.beascloud.com/beas202206/index.html?negative_bill_of_material.htm
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