Muri (Japanese term)
Muri (無理) is a Japanese word meaning "unreasonableness; impossible; beyond one's power; too difficult; by force; perforce; forcibly; compulsorily; excessiveness; immoderation". In lean manufacturing and the Toyota Production System (TPS), muri is commonly translated as "overburden" or "unreasonable requirements" and is discussed together with muda and mura as one of the three related forms of waste or inefficiency to be reduced.