BACE Good Manufacturing Practices (cGMP) 2 — Questions and Answers
Question 1: What does the 'c' in 'cGMP' stand for, and why is it significant?
- 'Certified' indicating the facility has passed FDA inspection
- 'Current' indicating regulations reflect state-of-the-art technology and are updated as science advances (Correct answer)
- 'Comprehensive' indicating all aspects of manufacturing are covered
- 'Compliant' indicating the manufacturer follows all applicable laws
Correct answer: 'Current' indicating regulations reflect state-of-the-art technology and are updated as science advances
'Current' signifies that GMP standards evolve with technological advances — manufacturers must adopt the most up-to-date practices, not just meet historical minimum standards.
The 'current' in cGMP signals that the regulations are dynamic. FDA uses cGMP to emphasize that compliance requires adopting current best practices. A manufacturing approach that was compliant 10 years ago may not be cGMP-compliant today if better technologies exist. This is why cGMP is described through principles rather than prescriptive rules.
Question 2: Under cGMP, what is a 'deviation' and how must it be handled?
- A deviation is any product that fails specification testing and must be discarded
- A deviation is a departure from an approved procedure or specification that must be documented, investigated for root cause, and assessed for product impact (Correct answer)
- A deviation refers to equipment calibration drift that requires immediate equipment replacement
- A deviation is a voluntary change to a manufacturing process that must be approved in advance
Correct answer: A deviation is a departure from an approved procedure or specification that must be documented, investigated for root cause, and assessed for product impact
A deviation is any unplanned departure from approved procedures or specifications; it must be documented, investigated to find root cause, and evaluated to determine whether affected product meets quality standards.
Under cGMP quality systems, the deviation management process: (1) detect and immediately document the event, (2) quarantine potentially affected product, (3) investigate root cause (5 Whys, fishbone diagram), (4) assess impact on product quality/safety/efficacy, (5) determine disposition (release, reject, or retest), and (6) implement CAPA (Corrective and Preventive Action) to prevent recurrence.
Question 3: What is the purpose of an Environmental Monitoring (EM) program in a cGMP cleanroom?
- To measure temperature and humidity for employee comfort
- To periodically sample air, surfaces, and personnel for microbial and particulate contamination to ensure cleanroom performance (Correct answer)
- To track energy consumption for ISO 14001 environmental compliance
- To monitor chemical vapor levels for OSHA compliance
Correct answer: To periodically sample air, surfaces, and personnel for microbial and particulate contamination to ensure cleanroom performance
EM programs sample cleanroom air, surfaces, equipment, and personnel to detect microbial and particle contamination trends and ensure the controlled environment remains within specified limits.
Typical EM activities include: active air sampling with volumetric air samplers, passive air settling plates, surface contact plates (RODAC plates) and swabs, and personnel glove plates. Results are compared to action and alert limits. Trending detects slow contamination events before limits are exceeded. Exceedances trigger investigations and CAPA.
Question 4: In cGMP, what is a 'change control' system designed to do?
- Manage production scheduling changes due to supply chain disruptions
- Formally evaluate, approve, document, and assess the impact of any change to a validated process, equipment, or material before implementation (Correct answer)
- Track changes to raw material prices for budget management
- Control employee shift changes to ensure qualified personnel are always present
Correct answer: Formally evaluate, approve, document, and assess the impact of any change to a validated process, equipment, or material before implementation
Change control is a quality system that ensures all modifications to validated processes, equipment, materials, or procedures are evaluated for quality impact and formally approved before implementation.
Validated manufacturing processes are designed to produce consistent quality product. Any change must be evaluated through change control: (1) raise change request with justification, (2) assess potential impact on product quality, safety, and efficacy, (3) determine if revalidation or regulatory filing is required, (4) obtain multi-departmental approval, (5) implement with training, (6) verify change effectiveness.
Question 5: What is 'out of specification' (OOS) in the context of cGMP testing?
- A result that exceeds the upper specification limit only
- Any analytical test result that falls outside the acceptance criteria established in the product specification (Correct answer)
- Equipment calibration results that fall outside maintenance intervals
- Any result obtained from an uncalibrated instrument
Correct answer: Any analytical test result that falls outside the acceptance criteria established in the product specification
An OOS result is any analytical result that falls outside established acceptance criteria — requiring investigation before product disposition decisions.
FDA Guidance 'Investigating Out-of-Specification (OOS) Test Results' (2006) provides the framework: Phase I laboratory investigation to rule out assignable cause (calculation error, sample preparation error, instrument malfunction); Phase II full-scale investigation including review of production records and possible retesting. OOS results cannot simply be averaged away or attributed to 'bad samples' without documented investigation.
Question 6: Which of the following best describes the purpose of a 'batch record' in cGMP manufacturing?
- A record of employee training for the production team assigned to a batch
- A complete chronological documentation of all steps, materials, equipment, and measurements for a specific production lot (Correct answer)
- A financial record tracking the cost of materials used in a manufacturing batch
- A summary of QC test results for a batch submitted to the FDA
Correct answer: A complete chronological documentation of all steps, materials, equipment, and measurements for a specific production lot
A batch record (or lot record) documents every step of manufacturing for a specific lot, including materials used (lot numbers, weights), equipment, process parameters, in-process checks, and operator signatures.
Master Batch Records (MBRs) define all steps for a product; Batch Production Records (BPRs) are the executed copies filled in during actual manufacturing. Each BPR must document raw material lot numbers and amounts, equipment IDs and calibration status, process parameters, in-process test results, any deviations, and operator signatures. BPRs enable complete traceability for any quality investigation.
BACE Good Manufacturing Practices (cGMP) 2
What does the 'c' in 'cGMP' stand for, and why is it significant?