On of the biggest challenge and discussion point related to Bill-Of-Material management is how and where to colour the colour parts. Colour parts are parts which get the vehicle decided colour shades during manufacturing. If we look at colour as a Variant Option on the product, then in that case the colour should be mentioned on EBOM. But is Colour a option or a function of Manufacturing?
Ideally colour should be function of Marketing, so it can be on the Variant Configuration, where Marketing can decide the colours of vehicle. Engineering’s job is to only identify which parts need to be coloured. So in my view EBOM should be only Black & White & not coloured. One simple reason for Colour shouldn’t be on EBOM is, if there is a change in colour at Planning or Manufacturing, there is no impact on functionality or there is no change request required on EBOM.
Engineering should pass colour part information to Manufacturing. It is Manufacturing & product planning, who needs to decide which parts should have what kind of colour and how many such units need to be manufactured. So ideally in my view Colour information of Part should be on Variant BOM and Manufacturing BOM. Even we can define colours in ERP than in PLM. Because colouring of Part is totally a manufacturing function in my view.
In my experience, I have seen organizations maintaining Colour options on Engineering BOM. I feel that is a unnecessary overhead on EBOM.
Conclusion: in my view… EBOM should be black & white and only Colour parts should be identified. Colour of parts can be maintained on MBOM & in ERP.