X Bar S Control Charts are a type of control chart often used to examine the process mean and standard deviation over time.
A cause and effect matrix is a six sigma tool that prioritizes the key process input variables based on priorities of customer outputs.
Causal theory, in Six Sigma terms, means that you create output (y) from an input (x) and a function (f). Clear as mud so far? Don’t worry.
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.
Maintaining solutions is one of the key activities in the Control Phase to ensure the new process is implemented and doesn’t revert.