(Rewritten for clarity)

I want to be able to build every variant on the same line without specifying the work order for that product. I have three assembly lines, each with two stations; an assembly station and a finishing station.

I want to be able to scan the product at each station on any line, and have it count the step that that station is responsible for. I do not want to stop scanning products to scan a work order.

I want to assign a work order to the assembly group without assigning it to a specific line or station.