SQF Terms: Monitor = the person doing the testing, checking, etc.
Verify = another person who confirms that the testing is being done per procedure and frequency.
Validate = management using trend analysis to assure the procedure is controlling the proper item or process.
CCP: Monitor - operator records temperature and time for pasteurization.
Verify - supervisor reviews records and signs off on the review.
Validate - management sees chart that shows the last 6 months or more, no pasteurized milk has had an unacceptable high level of bacteria.
PRP: Monitor - 3rd party calibrates the QA Lab equipment.
Verify - QA Manager reviews that calibration is done on schedule. Audits show nothing is part due for calibration.
Validate - Upper management reviews trend analysis showing nothing out of spec for what QA measured to be in spec due to uncalibrated equipment.
I work at a packaging plant that does not have CCP's. We do floor audits to make sure the procedures are being done (monitoring). We do document audits to confirm that records are being reviewed (verified). We do audits of meeting minutes to check that management is looking at trends - good or bad, and taking any necessary action (validation).