Muda – Mura – Muri are the three types of waste in Lean manufacturing.
For those working in manufacturing companies, especially in Japanese enterprises, the concept of the 3M is certainly familiar.
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Muri is deeply intertwined with the other two M letters, Muda and Mura. Mura (uneven) results in alternating between being overloaded with work and having nothing to do. Multiple Muda – Overproduction, Overhandling, Movement and Transportation – unnecessarily increases workload. Muri can also cause Muda.