Mura (Japanese term)

Mura () is a Japanese word meaning "unevenness; irregularity; lack of uniformity; nonuniformity; inequality", and is a key concept in the Toyota Production System (TPS) as one of the three types of waste (muda, mura, muri). Waste in this context refers to the wasting of time or resources rather than wasteful by-products and should not be confused with waste reduction. Toyota adopted these three Japanese words as part of their product improvement program, due to their familiarity in common usage.