Sayings of Shigeo Shingo

"Get a grip on the status quo. The most magnificent improvement scheme would be worthless if your perception of the current situation is in error. We tend to think that fictitious facts are real. By this we do not grasp the real facts or simply hypothesize facts using guess work, or we ignore changes over time and assume things are the same as they used to be." - Shigeo Shingo

In other words, go to gemba often!