| Pressure balancing failures | Contamination, containment breach | Early TAB involvement, door interlocks |
| Fume hood diversity miscalculation | Insufficient exhaust capacity | Verify diversity with lab users |
| Vibration transmission | Sensitive equipment malfunction | Vibration study, structural isolation |
| Pure water loop dead legs | Microbial contamination | Review loop design, slope to drains |
| Cleanroom finish defects | Particle generation, cleaning issues | Mock-up approval, installer training |
| Validation documentation gaps | Regulatory delays, re-work | Validation master plan early |
| Equipment utility mismatches | Delayed equipment startup | Verify OFE requirements early |
| Change control violations | GMP non-compliance | Establish change control process |