This document discusses manufacturing operations and controls to prevent mix-ups and cross contamination. It outlines precautions like proper air handling, segregated areas, and status labeling. Processing of intermediates and bulk products must be documented and checks put in place to ensure quality like verifying identity and yields. Calibration records and batch production and control records are required. Contamination can occur from materials, areas, equipment or people so trained personnel and technical measures like separate production areas are important controls.