What is the purpose of cleaning validation in GMP?

• A. A schedule for routine equipment maintenance.
• B. Guidelines for waste disposal.
• C. Documented evidence that cleaning processes effectively reduce residues to acceptable levels under defined conditions.
• D. A method for training sanitation personnel.

Answer: (C)

Cleaning validation provides documented evidence that cleaning processes effectively reduce residues to acceptable levels under defined conditions. This means we test and record that, for the specific equipment, soils, cleaning agents, surfaces, and process parameters (like contact time, temperature, and mechanical action), the residues left after cleaning are below pre-set limits. The evidence comes from validated analytical methods and a formal protocol that defines acceptance criteria, worst-case scenarios, and how data will be collected and analyzed. The goal is to prevent cross-contamination between products, protect consumer safety, and meet regulatory expectations. It isn’t about routine equipment maintenance scheduling, waste disposal guidelines, or training sanitation staff, but about proving that the cleaning process itself reliably achieves the required cleanliness and remains capable over time.