Certified Six Sigma Black Belt Exam Study Guide 2026

Lessons-learned sessions extract transferable insights—both successes and failures—to build institutional knowledge for future improvement efforts.

DOE is a key tool in the Improve phase, used to actively manipulate process inputs to optimize the response output after critical factors have been identified in Analyze.

A SIPOC diagram gives project teams a macro-level view of the process, capturing Suppliers, Inputs, Process steps, Outputs, and Customers to establish scope.

Transportation waste refers to unnecessary movement of materials or products between process steps.

A Pugh matrix (also known as a decision matrix or selection matrix) is a structured tool used to evaluate multiple alternatives against a set of criteria. It's particularly useful when there are several options and a need to systematically compare and select the best one based on weighted criteria. This tool helps in making objective decisions by scoring each option against a baseline.

The Improve phase is where solutions are developed, piloted, and verified to confirm they effectively address root causes.