Zero Defect Principle

Core Philosophy

The Zero Defect principle is a system designed to guarantee 100% quality at the source. Its co-creator, Shigeo Shingo, strived to design manufacturing environments and processes in a way that actively prevents workers from making typical, human errors.

"Defect = 0 is absolutely possible!" — Shigeo Shingo

Methodologies to Support Zero Defects

To successfully implement this principle, several core Lean and Quality tools are utilized:

• Six Sigma (Statistical variation reduction)

• Visual Management (Making abnormalities immediately visible)

• 5S (Workplace organization as a prerequisite for defect-free work)

• POKA-YOKE (Error-proofing / Mistake-proofing devices)

• Standardized Work (Ensuring process repeatability and consistency)

• 5 Whys (Root-cause analysis technique)

• Ishikawa Diagram (Fishbone diagram for cause-and-effect analysis)