have a functional question but can't seem to figure this out in Odoo.

Product A is set up with variants for size, length and width.  

   Widths are 4, 6, 8, 10

   Lengths are 10, 12, 14, 16 

each variant has their BOM.  But if 2 variants are chosen together there needs to be addition components added.  For example customer A picks variants Width 4 and length 10, standard BOMs work fine.  but if a customer picks 4x16 there needs to be additional component added for just that combination of variants.

How do we accomplish this in Odoo?

thanks,

Dave