Sounds a lot like TPS, I assume Toyota did a lot of the stuff before any books were written. Also, my personal experience, the more companies talk about Lean and Six Sigma the less they do it.
On the other hand, if the company all about how fantastic the culture is...run! Or at least tread very, very carefully.
"What's your company culture like?" - the way that the interviewer responds is a pretty good indicator of what their culture is like.
"If someone does something exceptional, how do you reward them?" works in a very similar way.