Characterizing a process using Designed Experiments involves
• Determining which Xs (both controlled and uncontrolled) most affect the Ys
• Identifying critical process and Noise Variables
• Identifying those variables that need to be carefully controlled in the process
Before reading this section it is important that the reader has read and understood “DOE—Introduction,” also in this chapter. This section covers only designing, analyzing, and interpreting a Characterizing Design, not the full DOE roadmap.
Characterizing Designs32 in Lean Sigma are based on a set of experimental designs known as Full Factorials and specifically the most efficient of those known as 2k Factorials. These are chosen because they ...