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Chapter 5: Basic Six Sigma Concepts, normal-distrubution-large, Pareto…
Chapter 5: Basic Six Sigma Concepts
Variation
exists in all processes
causes defects
reduced thru standardization
Standard Deviation
measures variation
smaller SD --> more consistent process
larger SD --> more variability
Pareto Principle (80/20 Rule)
80% of problems come from 20% of causes
used to prioritize improvement efforts
visualized with Pareto charts
Voice of the Customer (VOC)
what the customer wants/expects
drives quality improvement
helps define requirements
Basic Metrics
defects
defects per million opportunities (DPMO)
yield
sigma level
Customer Focus
quality defined by customer needs
improvements should increase satisfaction
drives efficiency and loyalty
