You mean the Air Force launcher used to show variation. I played with that in a classs a couple of years ago. Six Sigma has its value and place but like any problem solving process it can be oversold. I think GE has cooled on Six Sigma since Welch left, am I right?
I have had the most significant success by applying the simplest fundamentals of the methodolgy on intitiatives that were going to be undertaken anyway. It allows one to drive to a particular redesign and prove (or if necessary refute) the validity of the decisions. It ain't rocket science and it doesn't need to be presented that way. People who do that are trying to puff themselves up.
It's real simple:
How do we do this today and how often do we get things right?
What are the things about the way we do things today that could cause us to fail in our mission?
How well are we doing in relation to our targets and our customers' expectations?
How can we reduce the variability in the process and get things right the first time on purpose?
How will we evaluate whether our efforts are improving the process?
How much time or money or both are we saving the company by redesigning the process?
There of course is the hidden questions surrounding risk of change, what happens if we do nothing, etc. But the main point is as a way of approaching a problem or challenge Six Sigma offers some very interesting approaches.