The document outlines the process of change control for pharmaceutical companies. It defines types of changes like temporary, permanent, major and minor changes. The change control procedure ensures that all changes to procedures, materials, methods, equipment and software are properly documented, approved, validated and traceable. Changes are classified based on their potential impact on product quality. The change control process aims to complete approval within 30 days and closure within 90 days, with provisions for extension. Trending of change controls is also carried out monthly.