Introduction Today, every single company desires profit, high productivity, value in the market. There are defect reduction targets' slogans in most of the factories, but the final goal should always remain zero defects. "POKA-YOKE" is a crucial element in defect removal. Poka-yoke is a total quality management concept that is associated with limiting errors at source itself. Poka-yoke is associated with "fool-proofing" or "mistake-proofing.". A poka-yoke is any idea creation or mechanism design in a total productive management process which assists operator to prevent (yokeru) errors (poka). Principal objective of Poka Yoke concept is to make entire system error proof which means no body can commit mistake though some one desires to make mistake sin tentionally. It removes the defects or faults. This word was invented by Shigeo Shingo during 1960sfor Toyota Production System part. The purpose of Poka-yoke is to make the process in such a way that erro...