Which measurement would indicate better productivity in a laboratory?

The measurement that indicates better productivity in a laboratory is represented by a higher number of tests performed per paid hour. This metric directly assesses the efficiency of laboratory staff and processes, reflecting how much output is generated relative to the time paid for labor.

When a laboratory can perform more tests in less time, it is demonstrating enhanced productivity levels. Increased productivity can lead to cost savings, quicker turnaround times for patient results, and the ability to serve more clients without necessarily increasing staffing levels.

In contrast, increased hours spent on training or routine maintenance does not directly contribute to the immediate output of tests and may temporarily divert resources away from test processing. Similarly, while a larger amount of overtime worked may indicate that staff are trying to meet demand, it can also suggest inefficiencies in scheduling or staffing levels. Therefore, focusing on the volume of tests completed within standard working hours provides the clearest indication of a laboratory's productivity.