According to the CTSC Exam Content Manual1, the Measure phase of the Six Sigma DMAIC
methodology involves collecting data on current performance and issues. The Measure phase aims
to establish a baseline for the process and quantify the gap between the current state and the
desired state. The Measure phase also involves validating the measurement system, defining the
process metrics, and calculating the process capability and sigma level. Option A, Control, is the
phase that involves implementing and sustaining the improvements. Option B, Improve, is the phase
that involves identifying and testing the solutions. Option C, Analyze, is the phase that involves
analyzing the data and identifying the root causes.
