In Grade A areas monitoring is mandatory
“For grade A zones, particle monitoring should be undertaken for the full duration of critical processing.”
Getting a complete picture is mandatory too
“Grade A zones should be monitored at a frequency and with suitable sample size that all interventions, transient events, and any system deterioration can be captured”
Continue at: http://www.gmpua.com/CleanRoom/Monitoring/ContinuousParticleMonitoring/Continuous%20Particle%20Monitoring.pdf
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