My company started 6 sigma last spring. A big push to get people trained, 2 blackbelts, 4 green. After almost 6 months we started some projects. The projects were all things that have plagued us for quite some time and were being worked on (unorganized) at the time the projects were started. After two months, I cannot see that 6 sigma has done anything for us, other than information is more readily shared. Any improvements that have been made to processes is not because of what we are doing as a 6 sigma team, improvements are coming from things we started before the team was formed. There is a huge push on collecting date, which we should have had anyway, but no actual trials or evaluations have been done. Will we eventually have a better process? Probably, but I don't see that 6 sigma has given us anything that we shouldn't have been doing anyway.
The one thing that irks me most is the fact that management has totally ignored investigating problems and root cause analysis, and now that we have 6 sigma, they think that every thing that happens has to be handled using the 6 sigma methodology. Not to mention that not one of them has any training in 6 sigma.
Oh, well, time to get off the soapbox!