What does a control chart help monitor?

A control chart is a statistical tool used in quality control to monitor the stability and performance of a process over time. It helps identify whether a process is operating consistently within predetermined limits or if it is experiencing variations that may signal problems. By plotting data points over time along with control limits, a control chart enables teams to visually assess trends, shifts, or any unusual patterns that could indicate that a process is out of control.

The importance of this monitoring is that it allows organizations to take proactive measures to address variability in the process before it adversely affects the quality of the output. This aligns with the goals of Six Sigma, which focuses on reducing variability and improving process efficiency.

The other options do not directly relate to what a control chart specifically measures. Workforce efficiency, technical specifications, and customer satisfaction ratings might be analyzed through different methods or metrics, but a control chart specifically focuses on the process stability, making it an essential tool in quality management practices.