Certification: Qualification and Validation Evidence
Domain 4: Certification
Certification tests whether you can assemble and judge qualification evidence for people, equipment, and processes. In the Craftsman Bio Process exam, certification is not a training certificate alone; it is a documented conclusion that a defined scope is fit for use and remains in a qualified state.
Core rules
- Qualification lifecycle: user requirements specification (URS), design qualification, factory and site acceptance testing, then installation qualification (IQ), operational qualification (OQ), and performance qualification (PQ).
- Process performance qualification (PPQ) commonly uses three consecutive successful lots under a validation protocol, with predefined acceptance criteria.
- Continued process verification (CPV) monitors ongoing performance after PPQ; it is not a one-time exercise.
- Operator qualification requires demonstrated practical technique and documentation, not just completion of training modules.
- Change control assesses impact before implementation. A “minor” change can still require re-qualification if it touches critical parameters or sterile boundaries.
- Audit readiness means records are retrievable, attributable, and consistent with the qualified scope.
Worked example
A new single-use mixer is installed. Correct certification path: IQ verifies documentation, materials, and installation; OQ challenges leak integrity, mixing performance, and alarm response; PQ demonstrates performance in the intended process, often with three consecutive successful lots. Operators are qualified by observed practical demonstration, including aseptic connection and batch-record entry. Reasoning: each qualification stage answers a different question - installed correctly, operates correctly, and performs in use - so skipping a stage leaves the certification claim unsupported.
Traps that cost marks
- Treating training completion as operator qualification.
- Skipping PQ because IQ and OQ passed.
- Failing to reassess qualification after a change to a sterile boundary.
- Using a validation protocol with acceptance criteria written after the run.
- Presenting CPV as optional once PPQ is complete.