Process Capability Analysis(Measure Phase)Scope of ModuleProcess VariationProcess CapabilitySpecification, Process and Control LimitsProcess Potential vs Process PerformanceShort-Term vs Long-Term Process CapabilityProcess Capability for Non-Normal DataCycle-Time(Exponential Distribution)Reject Rate(Binomial Distribution)Defect Rate(Poisson Distribution)Process VariationProcess Variation is the inevitable differences among individual measurements or units produced by a process.Sources of Variationwithin 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)Types of VariationInherent or Natural VariationDue to the cumulative effect of many small unavoidable causesA process operating with only chance causes of variation present is said to be “in statistical control”Types of VariationSpecial or Assignable VariationMay be due to a) improperly adjusted machine b) operator error c) defective raw materialA process operating in the presence of assignable causes of variation is said to be “out-of-control”