We request Bill of Materials (BOM) in order to have a precise quotation from a supplier. To provide us with a feasible answer, suppliers need to know the parts’ names, specifications and the drawing of the product. This information is also important for us, because understanding a product’s current development stage is a key part of a successful project. In summary, we ask for BOM in order to:
have a reliable quotation
understand the product / prototype
select appropriate candidate suppliers
understand the stage of product development