Aseptic processing entails certain critical control parameters. Which of the following is NOT a critical control parameter?

• A. Nonsterile technique
• B. Cleanroom classification
• C. Sterile filtration
• D. Validated sterilization

Answer: (A)

The key idea is that critical control parameters are measurable, controllable factors in the process that directly affect sterility. Cleanroom classification, sterile filtration, and validated sterilization are all quantifiable controls that can be monitored and validated to ensure the product remains sterile. Nonsterile technique, on the other hand, represents how operators perform the tasks and is addressed through training and SOPs rather than as a directly monitored process parameter. It’s essential for aseptic work, but it isn’t a controllable parameter you measure during production. So nonsterile technique is not a critical control parameter.