DPU is a metric used in Six Sigma projects, it stands for 'Defects Per Unit'. It is the average number of defects per unit based on processing a number of units. Suppose you observe 100 units being made. Five fail, four are reworked, and one is scrapped. The DPU is 0.05.
Refer to Six Sigma Metrics for other measures used in Six Sigma projects.
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