Setting Up Items for Co-products and By-products
Create items for co-products and by-products using standard procedures. For co-products, it is important to set the BOM/Formula field equal to a base process item number.
In Item Master Maintenance (1.4.1), Item Planning Maintenance (1.4.7), or Item-Site Planning Maintenance (1.4.17), enter the following for each co‑product and by-product of a given base process.
Item Number
Enter an item number for the co-product or by-product.
Planning Parameters
Normally, you accept default values for these fields. MRP does not use planning parameters for co-products. Instead, it uses the parameters of the base process. MRP does not plan the base process to satisfy demand for a by-product. Rather, it plans by-products using the conventional method.
Pur/Mfg
Leave blank or enter M (manufactured) for co-products. Enter any value for by-products.
BOM/Formula
Enter the item number for the base process normally used to produce this co-product or by-product. This field is used for planning, work orders, and cost roll-up. An item can be a by-product and have a normal BOM/Formula code.
Note: For items that are always by‑products, BOM/Formula codes are optional. Entering the base process item number as the BOM/Formula code for by-products and co-products enables you to sort MRP Summary and Detail Reports by BOM/Formula code.
Routing Code
This should be left blank in most cases. If a co-product has a preferred routing different from the base process routing, enter that preferred routing. This routing must be set up as an alternate routing for the base process.
Phantom
Enter No. A co-product can be a component in a regular product structure, but the structure type cannot be X (phantom).