Six Sigma Black Belt Certified 2025 – 400 Free Practice Questions to Pass the Exam

The purpose of a control chart is to monitor process stability, which is crucial for ensuring that a process operates within specified limits and remains consistent over time. By displaying data points over time and using control limits, a control chart helps identify variations in the process—distinguishing between natural variations (common cause) and variations due to specific issues (special cause). This allows organizations to maintain control over their processes, make informed decisions, and implement corrective actions as necessary.

While tracking project milestones, reducing production costs, and assessing employee performance are all important aspects of a business, they do not capture the primary function of a control chart, which is focused on the ongoing assessment of process behavior and stability. The insights gained from control charts can ultimately lead to improvements, including potential cost reductions, but the fundamental goal remains to ensure that processes are stable and predictable.