When is PMCS required to be performed?

• A. Before, during and after the operation of a piece of equipment and also at weekly and monthly intervals.
• B. Before operation only
• C. During operation only
• D. After operation only

Answer: (A)

PMCS is about keeping equipment ready and safe by checking it at multiple points in time, not just once. Doing checks before you operate ensures everything essential is functioning and safe to use. Checking during operation helps catch issues that develop while the machine is working, preventing a small problem from becoming a breakdown. After operation allows you to spot wear, leaks, or damage that appeared during use and to address it before the next job. Regular weekly and monthly inspections extend this by covering maintenance tasks that aren’t tied to a single use, such as lubrication, fluid checks, and more thorough inspections.

This combination—before, during, after, plus scheduled weekly and monthly maintenance—provides continuous readiness and reliability, which is why it’s the best approach. If you limited checks to only one time window, you could miss problems that arise in the other phases, reducing safety and uptime.