Muri

Muri is a Japanese word meaning “unreasonableness; impossible; beyond one’s power; too difficult; by force; perforce; forcibly; compulsorily; excessiveness; immoderation”, and is a key concept in the Toyota Production System as one of the three types of waste.

An example of muri would be overburdening equipment or operators by requiring them to run at a higher or harder pace with more force and effort for a longer period of time than equipment designs and appropriate workforce management allow.