Determining Process Performance and Capability in Six Sigma

Candidates seeking Six Sigma Black Belt certification, quality professionals, engineers, production managers, frontline supervisors, and all individuals charged with responsibility for improving quality and processes at the organizational or departmental level, including process owners and champions

Proficiency at the Green Belt level with basic concepts in the measurement and analysis of process capability as scoped in the ASQ – Six Sigma Green Belt body of knowledge (BOK)

Expected Duration
119 minutes

In any improvement initiative, organizations must determine whether their existing processes meet the targets and specifications demanded by the customer, or by the business. Measuring and analyzing the capability and performance of a process under review enables organizations to numerically represent and interpret its current state, and to report its sigma level. When done correctly, process capability analyses enable Black Belts to precisely assess current performance in light of future goals, and ultimately, to determine the need and targets of process improvement. Process capabilities can be determined for normal and non-normal data, variable (continuous) and attribute (discrete) data, and for long- and short-term alike.
This course explores key considerations and calculations used in determining process capability and performance. This includes choosing parameters, verifying the stability and normality of a given process, and gathering and interpreting capability and performance data using common indices. The course also explores the special treatment of non-normal data and attributes data in the context of a capability study and long-and short-term capability. This course is aligned with the ASQ Certified Six Sigma Black Belt certification exam and is designed to assist learners as part of their exam preparation. It builds on foundational knowledge that is taught in SkillSoft’s ASQ-aligned Green Belt curriculum.


Process Performance and Capability Measurement

  • recognize how specification limits, process limits, and process spread help determine process capability
  • calculate process performance using metrics for yield, defect, and sigma levels
  • use appropriate process capability and performance indices to assess a given process

Process Capability and Long-term Capability

  • identify suitable approaches for identifying characteristics, tolerances, and specifications in a process capability study
  • match methods of testing normality to their descriptions
  • recognize the characteristics of short-term and long-term capability

Capability for Non-normal and Attribute Data

  • recognize how to process non-normal data in a capability study
  • match attribute control charts with the circumstances in which they can be used to determine process capability





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