What does continued verification entail in process validation?

• A. One-time checking after validation.
• B. Verifies software only.
• C. Verifies only suppliers.
• D. Ongoing monitoring and testing of produced output to ensure it remains within specifications.

Answer: (D)

Continued verification means ongoing monitoring and testing of the produced output to ensure it remains within specifications. After initial validation, the process is regularly observed and sampled, using in-process checks, finished-product testing, and data trending to confirm that performance stays in control over time. This approach catches drifts or changes in the production process early and supports timely corrective actions, such as adjustments or CAPA, to maintain quality.

One-time checking after validation only confirms status at a single point and does not ensure ongoing compliance. Verifying software alone misses the broader manufacturing process and product quality attributes. Verifying only suppliers focuses on inputs rather than how the process performs and what the output remains like over time.