What calibration and maintenance information should an SOP include for equipment?

• A. Last calibration date only.
• B. Calibration schedule, traceability to standards, acceptance criteria, records of maintenance, and calibration status.
• C. Acceptance criteria and maintenance records only.
• D. Calibration status is optional.

Answer: (B)

Calibration and maintenance information in an SOP should cover the full scope needed to keep equipment reliable, accurate, and compliant. The best answer includes a clear calibration schedule so checks happen regularly and no instrument goes untested. It also includes traceability to standards, which ties measurements to recognized references and supports auditability and regulatory compliance. Acceptance criteria define what constitutes passing or failing a measurement or performance check, giving objective limits for action. Records of maintenance provide a traceable history of service, repairs, and adjustments, essential for quality assurance and root-cause analysis. Calibration status shows the current state of the instrument (in or out of tolerance, due for recalibration, etc.), so operators know whether the equipment is fit for use at a glance.

Without these elements, you might have only a single date or vague notices, making it hard to prove ongoing accuracy, justify when to recalibrate, or demonstrate compliance.