The Control phase is the fifth and last phase of a DMAIC process. The main activity in the Control phase is to control the improved process.
The multi-vari chart shows you variation by separating it into three possible sources (within-piece, piece-to-piece, and time-to-time.)
Response surface modeling is a mathematical and statistical technique useful for developing, improving, and optimizing the process.
FMEA (Failure Mode Effects Analysis) is a tool that helps us anticipate what might go wrong with a process and identify the possible causes.
Brainstorming generates a large number of creative ideas in a short period of time. In Six Sigma, it helps you find solutions to issues.