Six Sigma Black Belt Practice Exam 2026 – Complete Prep Resource

The DMAIC framework, which stands for Define, Measure, Analyze, Improve, and Control, is a structured problem-solving methodology commonly used in Six Sigma projects. Root Cause Analysis is a critical component within the Analyze phase of DMAIC. This phase focuses on identifying the fundamental causes of defects or problems that have been measured in the previous stages.

Root Cause Analysis employs various techniques to drill down into the issues that contribute to inefficiencies or quality defects. This ensures that the solutions developed in the Improve phase target the correct issues, leading to sustainable improvements in processes. By identifying the root causes, teams can prevent reoccurrences of defects and ensure that improvements are based on a solid understanding of the problem.

The other types of analyses listed can be important in different contexts or methodologies, but they do not align as closely with the structured analysis focus within the DMAIC framework. Qualitative analysis may be used in various phases, but it does not specifically target root causes. Regression analysis and time series analysis can be useful statistical tools but are often employed for different purposes, such as modeling relationships or forecasting, rather than directly identifying the underlying causes of problems in the context of DMAIC. Thus, root cause analysis is the most appropriate choice as it fits directly into the