What accomplishment metric measures the percentage of checks performed within periodicity?

The correct answer is the Periodic Accomplishment Rating, as it specifically quantifies the effectiveness of maintenance checks or tasks completed on schedule. This metric focuses on tracking how well an organization adheres to its planned maintenance schedule by measuring the percentage of checks that are carried out within the designated time intervals. By using the Periodic Accomplishment Rating, maintenance managers can assess whether they are meeting their goals for preventive maintenance and identify areas for improvement if compliance does not meet expectations.

On the other hand, the other options refer to different metrics that may not specifically address the timing aspect of checks performed within the set periodicity. For instance, while the Current Accomplishment Ratio and other metrics can provide valuable insights into various aspects of maintenance performance, they do not focus solely on the adherence to scheduled periodic tasks like the Periodic Accomplishment Rating does.