From Elsmar Cove Quality Assurance and Business Standards Wiki
Muda, Mura, Muri - Waste, Unevenness, Overburden - Japanese terms used as "check points" for identifying the areas in need of improvement.
The main goals of the TPS - Toyota Production System are to design out overburden (muri), inconsistency (mura) and eliminate waste (muda)
See also
TPS
References
[Wikipedia]