EXPLAINER
What is a Bill of Materials (BOM)?
A Bill of Materials - BOM - is the engineering recipe for a manufactured product. It lists every raw material, component, sub-assembly, and quantity required to build one finished unit. BOMs are the foundation of MRP: without them, the system cannot calculate what to buy or build.
Single-level vs multi-level BOMs
A single-level BOM lists only the immediate components of a product. A multi-level BOM nests sub-assemblies inside the parent product, so you can see (and plan for) the full hierarchy. FabHub supports multi-level BOMs with operations and yield, which means MRP calculations roll up through every level.
What goes in a BOM
At minimum: each component's part number, description, quantity per parent, and unit of measure. Production-grade BOMs also include sourcing notes (preferred supplier, lead time), revision history, scrap factor, and operational steps (which work centre, sequence, and time).
Why BOM accuracy matters
Every downstream calculation - procurement, production scheduling, costing, stock allocation - depends on the BOM being correct. A wrong quantity-per multiplies through demand: if you over-state by 5% and you ship 10000 units, you have over-ordered 500 units of every component. BOM hygiene is a high-leverage habit.
How FabHub handles BOMs
FabHub's Items module manages BOMs as first-class data with revision history, multi-level nesting, operations, and yield. BOMs drive procurement, work orders, and stock allocation automatically - change the BOM and the next MRP run reflects it.
edu.whatIsBom.sections.4.h2
edu.whatIsBom.sections.4.p
edu.whatIsBom.sections.5.h2
edu.whatIsBom.sections.5.p
edu.whatIsBom.sections.6.h2
edu.whatIsBom.sections.6.p
edu.whatIsBom.sections.7.h2
edu.whatIsBom.sections.7.p
edu.whatIsBom.sections.8.h2
edu.whatIsBom.sections.8.p
edu.whatIsBom.sections.9.h2
edu.whatIsBom.sections.9.p
edu.whatIsBom.sections.10.h2
edu.whatIsBom.sections.10.p
edu.whatIsBom.sections.11.h2
edu.whatIsBom.sections.11.p