3 MU

Posted on November 11, 2009 by


Muda, Muri, and Mura are three enemies to maintaining a lean six sigma process. Muda (waste), Muri (strain), and Mura (discrepancy) are Japanese words representing what should be eliminated in a process. Muda may take on many forms, such as unnecessary waiting, defects, over-production, and adding details that are unimportant to the customer. Muri focuses on the problem of straining capacity, such as over-working people to the point that they make mistakes or get behind in their work so that others are waiting on them. Mura is unnecessary variation which can create a number of problems. For example, if different people choose to use different tools to do the same job, there may be differences in the output and more complexity in ordering supplies. In summary, the goal is to identify and eliminate Muda, Muri, and Mura.

Posted in: Six Sigma