What is the effect of regulatory performance criteria 'm/M' in identifying control status?

• A. They indicate the maximum allowed loads per regulation
• B. They reflect the expected maximum bacterial loads when the process is under control
• C. They are used to set action thresholds for recalls
• D. They determine the minimum sample size

Answer: (B)

The m/M regulatory performance criteria are used to judge whether a process is in control by two fixed thresholds that reflect what the process should produce under normal, controlled conditions. If a measured bacterial load is at or below the lower threshold, the process is considered in control. If it sits between the two thresholds, corrective actions are warranted to prevent losing control. If it exceeds the upper threshold, the process is out of control and requires urgent intervention. This is why the idea the question tests is that these criteria represent the expected maximum bacterial loads when the process is under control. They are not simply a regulation-based maximum, a recall trigger, or a minimum sample size.