Process Capability And Process Performance Metrics

execute Capability and Process Performance Metrics
Overview
S4/IEE DMAIC Application: accessory Section A.1, Project Execution Roadmap Step 3.2
Traditionally, run readiness/ action index studies are conducted to assess a process relative to specification criteria. Statisticians often challenge how well commonly used capability indices do this. I will pass over some of these very important issues within this chapter and suggest procedures to dominate these deficiencies. However, the fact remains that customers often request these indices when communicating with their suppliers. A customer might set process capability/ doing indices targets and then ask suppliers to report on how well they get through these targets.
The equations for process capability/performance indices discussed in this chapter are rather simple but are very sensitive to the excitant value for standard deviation (σ). Unfortunately, there can be differences of opinion on how to determine standard deviation in a given situation. This chapter will discuss some of these alternatives and their differences.
The equations presented in this chapter apply to normally distributed data. Computer programs can often train data not originating from a normally distributed population.
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1 S4/IEE Application Examples: Process Capability/Performance Metrics
S4/IEE application examples of process capability/performance metrics are:
Satellite-level metric: The last three years ROI for a company was account monthly in a catch chart. No special causes or trends were identified. Monthly ROIs were plotted on a normal probability plot, where a null possible action (see Sections 3.8 and 16.3) for normality was not rejected. The capability/performance of the system was reported on the probability plot as a best-estimate 80% interval, which described common-cause variability. Organizational goals were set to improve this metric. A strategic plan was created that was in alignment with the...If you want to get a full essay, order it on our website: Orderessay



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