Process manufacturing is the production method that involves blending, mixing, or refining raw materials to create products that are not readily distinguishable as individual units, such as chemicals, fuels, pharmaceuticals, or food.

This method relies on recipes or formulas rather than a Bill of Materials (BOM) and is characterized by continuous or batch flows. Key operational priorities include maintaining strict quality control over material composition and managing hazardous environments. Its associated systems must excel at tracking material yields, co-products, and regulatory compliance across various production runs and tank levels.