This document discusses scale-up and post approval changes (SUPAC) for pharmaceutical products. It defines scale-up as increasing batch size from research to production. SUPAC includes changes to components, manufacturing site, scale of manufacture, and manufacturing process/equipment. It provides classifications (Levels I-III) for types of changes to excipients, batch size, equipment, and processes. Level I changes typically require less supporting validation/documentation than Level II or III changes. The presentation provides guidance on classifying different post-approval changes to determine regulatory submission requirements.