Lesson V: Six Sigma Measure Phase

This chapter is about the ‘Measure’ phase of the DMAIC.


  • Types of Process Maps
  • Sampling in Data Collected
  • Descriptive Statistics
  • Measurement System Analysis (MSA)
  • Process Performance Measures

5. Process Performance Measures

Some of the commonly used Process Performance Metrics are:

  • Defects per Unit (DPU):
  • Defects per Opportunity (DPO):
  • Defects per Million Opportunities (DPMO)
  • Rolled Throughput Yield (RTY): It’s a measure of the end-to-end process performance.
  • Cost of Quality (CPQ): Prevention, Appraisals (Internal Inspection), Internal Failure (Defects, Scrap, Rework) and External Failure (Warranty claims and recalls)
  • Cost of Poor Quality (COPQ):

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