JB:
Suggestion:
Since WWilson works for an OEM machine builder, and it is a repetitive process.... having to put wire markers on wires every time, is a viable solution.
It is also more costly than having pre-numbered wires. (Labor to put the markers on is costly...) also, pre-numbered wires, some will argue that if subjected to a lot of handling.... will experience the printing rubbing off... but the wire markers... over time, will have their adhesive dry out... and will fall off....
From a manufacturing repetitive process view point... pre-numbered wires would seem to be the better choice ..