Which statement best describes the purpose of critical limits in HACCP?

• A. Prevent hazards by identifying potential hazards
• B. Schedule cleaning tasks
• C. Determine packaging suppliers
• D. Define safe maximum or minimum values to prevent hazards

Answer: (D)

Critical limits are the numeric or observable criteria that mark safe operation at each critical control point. In HACCP, these limits translate safety into concrete thresholds that must not be exceeded or dropped below. They are the boundary between safe and unsafe process conditions, and when met, they help ensure hazards are prevented, eliminated, or reduced to acceptable levels. They’re typically specific measurements such as a minimum internal cooking temperature for a set time, a maximum holding temperature, or a target pH or moisture level. If the process stays within these limits, the hazard is controlled; if not, corrective actions are taken to bring the process back into range and prevent unsafe product. Other options describe identifying hazards (not the limits), scheduling sanitation tasks, or selecting suppliers, which are related activities but not the defined thresholds used to control hazards at a CCP.