BOMs define everything necessary to manufacture products and comprise the core building blocks of the product record. However, too often BOMs are managed across multiple systems by engineering and manufacturing teams. This leads to disconnected development processes resulting in product launch delays, quality issues, manufacturing mistakes, and costly scrap and rework to correct product issues. In this whitepaper, we outline the problems with manual BOM management tools like spreadsheets and email and compare them to a dedicated BOM management system. Topics covered are BOM management challenges such as change, revision and compliance management, communication issues with project teams, suppliers and contract manufacturers, and comparison of manual vs. automated BOM management tools.