“Continuous improvement means getting better every day and is the driver for building a sustainable enterprise. Only those at the gemba [where the work is done] can understand the problems fast enough to react quickly. Continuous improvement depends on a different [understanding] of the role of the human—all humans are problem detectors and problem correctors—thinking scientifically.”  

The Toyota Way 2nd Edition by Jeffrey K. Liker (McGraw Hill, 2021) p. ix.