BOM stands for Bill of Materials. It is the structured list of materials, parts, sub-assemblies and quantities required to manufacture a product.
BOM may look like a simple list, but it controls many important factory decisions. MRP, purchase planning, inventory, costing and production planning all depend on BOM accuracy.
Why BOM accuracy matters
If BOM quantity is wrong, material requirement will be wrong. If material code is wrong, purchase may buy the wrong item. If alternate material is not defined, planning may stop even when a usable substitute exists.
BOM and MRP
MRP uses BOM to calculate material requirement from production demand. If the factory plans 1,000 finished goods, the system multiplies BOM quantity by demand and compares it with inventory.
BOM and costing
Material cost is usually a major part of product cost. If BOM is outdated, product costing will be inaccurate. This can affect quotation and profitability.
BOM levels
Some products have single-level BOM. Others have multi-level BOM with sub-assemblies. Multi-level BOM should be managed carefully because one missing child item can stop final assembly.
Common BOM mistakes
Common mistakes include duplicate item codes, wrong units, missing scrap allowance, outdated revisions, unclear substitute materials and poor approval control.
How Factovare helps
Factovare treats BOM as a foundation for material planning, production planning and costing. The goal is to connect product structure with actual factory decisions.
Conclusion
BOM management is not only an engineering activity. It is a factory control activity. Accurate BOM improves planning reliability, costing accuracy and inventory control.