mistake proofing

How to Poka-yoke CAD Drawings

The following question has been posed on many Internet discussion forums: Has anyone poka-yoked a computer-aided design (CAD) system? The goal of poka-yoke, or mistake-proofing, is to design a process or mechanism that prevents an error from occurring. In the world of machine and industrial design, CAD systems are one of the best forms of…


Work Instructions for Mistake Proofing

1. Use cross-functional teams (CFT) approach to mistake proofing. 2. Selection of process for mistake proofing. During the third phase of advanced product quality planning (APQP), the CFT shall identify the processes, where, due to avoidable human errors, the rating of “occurrence” and/or “detection” have increased thereby increasing the risk priority number (RPN) for the process. Poka-yoke techniques…


How Mistake Proof Are Your Processes?

It was a Japanese manufacturing engineer named Shigeo Shingo who developed the concept that revolutionized the quality profession in Japan. Originally called “fool proofing” and later changed to “mistake proofing” and “fail safing” so employees weren’t offended, poka yoke (pronounced “poh-kah yoh-kay”) translates into English as to avoid (yokeru) inadvertent errors (poka). The result is…


5 Lean Tools and Principles to Integrate into Six Sigma

Increasingly, organizations that use Six Sigma are making an effort to integrate Lean into their existing process-improvement framework. For many, combining Six Sigma’s focus on process quality and Lean’s emphasis on turn-around time results in more high-impact, quick-hit projects. To gain this advantage, however, organizations must face a difficult obstacle: integrating Lean without creating ripples…


Lean Banking: It Is Not Always Just Single-Piece Flow

“Let the process flow.” “Let the customer pull.” This is what is written in manufacturing books about making processes Lean. But it is not always that simple. Consider this banking example. A customer arrives at a bank branch: He enters, is welcomed by an employee and offered a cup of coffee. He explains his interest…