Z

zero quality control (ZQC)

Quality practices aimed at achieving zero defects and therefore eliminating the need for ad-hoc control. It is based on the recognition that people will make mistake and the principle that defects can be prevented by controlling the performance of a process (preventing any mistake from becoming an defect), e.g., using techniques such as mistakeproofing aka. poka yoke).

_{Reference: Shingo, Shigeo (1986). Zero Quality Control: Source Inspection and the Poka-Yoke System. Taylor & Francis.}

zone [TP]

In takt planning, a delimited space where one production unit isscheduled to complete a certain scope of their work within the takt time.