Why Don't Six Sigma Devotees Want Their Claims Of Quality Improvement Checked?
… said that CR measures perception of car quality. CR’s sends out surveys to those that own that specific make, model, and year, and then collects the results. This is first-hand experience. I fill out the survey myself and have been sufficiently impressed with CR to be a member for around 25 years.
So I think what you are saying is the CR car quality study cannot be used to measure car quality. However, I am not aware of a superior survey on automotive quality.
Response from Six Sigmaer
Developing a survey (instrument) is very technical. I mentioned …