Poka-yoke
Poka yoke, pronounced “POH-kah YOH-keh” — is a Japanese term that translates as “mistake-proofing” (from the Japanese yokeru (avoiding) and poka (inadvertent errors). A poka-yoke device is any mechanism that either prevents a mistake from being made or makes the mistake obvious at a glance. The idea is to prevent errors from being made in the first place, or if they are made, making those errors very obvious. The concept was formalised on the Toyota production lines by the Japanese industrial engineer Shigeo Shingo. more »