Zero Quality Control is a method/approach for achieving zero defects in an organization. Zero gives reference to the objective of ZQC which is to produce products/services with zero defects.
The approach was first outlined in the book Zero Quality Control: Source Inspection and the Poka Yoke System which outlined the main concepts of the ZQC approach and included many case studies. The ZQC system is unique in the sense that it did not look to blame people for errors or human mistakes. Rather the focus was on controlling processes in such a way that the process would not produce defects even if human error was introduced into the process. Dr. Shingo recognized that for the system to prevent errors it needed to acknowledge that all machines and people will at times make mistakes. With that said, it is important to understand that mistakes can occur and those mistakes do not have to result in defective parts or even defects. Therein lies the foundational secret of the Zero Quality Control System, mistake proofing. Essentially the system prevents errors, mistakes and defects from occurring which ultimately accomplishes the goal of the system, zero defects.
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