Requalification and Periodic Review
Requalification and periodic review ensure that a GMP facility remains in a state of control after initial qualification. These activities recognize that facilities change over time due to aging, operational use, maintenance activities, and formal modifications. Initial qualification alone is not sufficient to demonstrate ongoing compliance. For facilities, requalification is not automatic or time-based by default. It is driven by risk, documented evidence, and operational history.
Purpose of Periodic Review
Periodic review is the primary mechanism used to assess whether a facility continues to operate as intended and remains suitable for its defined use. It provides a structured evaluation of facility performance, change history, deviations, and maintenance trends. The objective is to determine whether:
- Existing qualification remains valid
- Additional verification is required
- Design assumptions remain appropriate
Periodic review supports proactive decision-making rather than reactive remediation.
Requalification Triggers
Requalification is performed when justified, based on defined triggers rather than fixed schedules. Typical triggers include:
- Changes implemented through formal change control
- Modifications to facility layout, systems, or utilities
- Significant maintenance or replacement of critical components
- Repeated deviations or adverse performance trends
- Extended shutdowns or changes in facility use
- Regulatory observations or inspection commitments
The depth and scope of requalification are determined based on impact and risk, not precedent.
Risk-Based Requalification Approach
Requalification activities should be targeted and proportionate. Depending on the nature of the trigger, requalification may involve:
- Document and design review only
- Targeted operational testing
- Partial re-execution of IQ or OQ activities
Full requalification is rarely necessary for facilities and should be reserved for major changes or loss of control scenarios.
Strong position: Requalification should confirm control, not recreate initial qualification.
Documentation and Governance
Periodic reviews and requalification decisions must be documented and approved through established quality systems. Typical documentation may include:
- Periodic facility review reports
- Change impact assessments
- Requalification justification and scope definition
- Summary reports of executed activities
Clear documentation demonstrates that continued control is actively managed and not assumed.
Lifecycle Perspective
Requalification and periodic review close the loop in the facility qualification lifecycle. They link routine operation back to original design intent and qualification decisions, ensuring that facilities evolve in a controlled and compliant manner. Maintaining compliance is achieved through ongoing oversight and disciplined decision-making, not repetitive qualification without justification.