Any system in a process that assists an equipment operator in avoiding (yokeru) mistakes (poka) is referred to as a poka-yoke. Its goal is to eliminate product defects by preventing, correcting, or bringing human errors to light as soon as they occur.

Poka-yoke is a technique used in the workplace to prevent simple human error. Poka-yoke is a system for preventing unintended errors committed by workers conducting a process. It is also known as mistake-proofing, goof-proofing, and fail-safe work procedures. The goal is to take over repetitive tasks that rely on memory or attentiveness and prevent any breaks in concentration.