The Full Form of OPRP is Operational Prerequisite Programs.

An OPRP is a prerequisite program that controls a significant hazard. It is a control measure that has been deemed crucial, but not considered a CCP (not an absolute control or can be managed upstream from the CCP). OPRPs are identified through risk assessments. You will need to determine what can be measured and then determine how. They should be treated just like a CCP (identify, monitor, verification, corrective actions, recordkeeping, etc) but you won’t need to define a critical limit. And they may not target a specific source of the hazard but should reduce the likelihood of exposure to the hazard or other contamination sources.