I'm trying to implement Odoo in a Manufacturing company. They use custom BoM with measures for each item; also, they use routes for some items included in the BoM as Bom lines, but, afaik, it is not possible to put routes for a specific item in the BoM.

People suggest using a BoM and a specific route for each sub item, applying multiple BoMs in the manufacture, but it has a big problem: they are just items in a full product, in the final part of the process all items will be assembled in the final product, and there are many assembly groups as part of other products, so, it will increase more and more and we could have a lot of subBoMs with main BoM.

Items with specific routes must follow this route before to be assembled in the main product in the final step of its route.

How can i implement this feature?