0cc94f64_Top_25_Lean_Tools__How_Does_It_Help_
[Lean Tool] Poka-Yoke (Error Proofing) [What Is It?] Design error detection and prevention into production processes with the goal of achieving zero defects. [How Does It Help?] 
It is difficult (and expensive) to find all defects through inspection, and correcting defects typically gets significantly more expensive at each stage of production.
Top 25 Lean Tools
How Does It Help?