Bill of Materials (BOM)

A bill of materials (BOM) is the full list of components that go into a style — fabrics, trims, labels, and packaging, with quantities and suppliers. It is the basis for costing a garment and for instructing the factory what to use.

The BOM drives the cost: every material and its consumption feeds the FOB and, with freight and duty, the landed cost. An incomplete or out-of-date BOM produces a costing that is wrong before production even starts.

It lives in the tech pack and should carry the same version through development, costing, and the PO — so what is costed is what is built.