Question

monitoring a process means ______ over time.
○ eliminating key variables
○ taking measurements of key variables
○ identifying key variables
○ improving key variables

Explanation:

To determine the correct answer, we analyze the concept of process monitoring. Monitoring a process involves tracking the performance of key variables over time, which aligns with "taking measurements of key variables". Eliminating or improving key variables are actions related to process improvement, not monitoring. Identifying key variables is part of process setup, not monitoring.

Answer:

taking measurements of key variables (the third option)