Error-proof , POKA YOKE: by MIE
Error proofing is a structured approach to ensuring quality all the way through your work processes. This approach enables you to improve your production or business processes in order to prevent particular errors, and hence defects from happening.
This methodology is vital for lean system, where defects in the products or services are not accepted while there is no tolerance. In “fat” system defects can be easily replaced by good ones, later on count defects and repair them.