Understanding Serial Number Assignment
You assign serial numbers to work orders to track serialized items within lots. You can assign serial numbers to work orders at any time. When you enter serial numbers, the system creates serial number master records, as well as work order lot or serial numbers. The system does not validate any serial number that you enter until you complete the work order. If you do not assign a serial number to a serialized assembly, the system requires a number before you can complete the work order. After you complete a work order, you cannot modify any serial numbers that are assigned to the assemblies.
You can assign serial numbers to specific assemblies at any time before the work order is completed. You can also assign serial numbers to specific assemblies at the time of work order completions by selecting Lot SN Generation from the Form menu on the Serial Number Revisions form (W3105B). You can associate serialized components to a specific assembly either at inventory issues or at work order completions. You must issue serialized components in their respective primary unit of measure to associate them to a specific assembly.
The Assign Serial Numbers program (P3105) assumes a quantity of one in the unit of measure on the work order. For serialized assemblies, this is the primary unit of measure. You cannot enter more serial numbers than the quantity on the work order.