六西格玛培训材料(英文版)(ppt 72页)

六西格码培训材料(英文版)内容摘要：
Process Variation
Process Capability
Specification, Process and Control Limits
Process Potential vs Process Performance
Short-Term vs Long-Term Process Capability
Process Capability for Non-Normal Data
Cycle-Time(Exponential Distribution)
Reject Rate(Binomial Distribution)
Defect Rate(Poisson Distribution)
Process Variation is the inevitable differences among individual
measurements or units produced by a process.
Sources of Variation
within unit(positional variation)
between units(unit-unit variation)
between lots(lot-lot variation)
between lines(line-line variation)
across time(time-time variation)
measurement error(repeatability & reproducibility)

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