@Abdelhaqa1
Checking in with my technical friends at PTC. Here is a simple explanation:
"In short, the product structure (eBOM) that is created by the engineers who design a product, may be different from the structure (mBom) needed by the engineers who describe how the product is manufactured."
This older post Design view and Mfg view
might be a good resource for you also,
Please mark this as your "Accepted Solution" if this helps. TY!
