Chapter

Six Sigma with R

Volume 36 of the series Use R! pp 101-112

Date:

Process Capability Analysis with R

  • Emilio L. CanoAffiliated withDepartment of Statistics and Operations Research, Rey Juan Carlos University
  • , Javier M. MoguerzaAffiliated withDepartment of Statistics and Operations Research, Rey Juan Carlos University
  • , Andrés RedchukAffiliated withDepartment of Statistics and Operations Research, Rey Juan Carlos University

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Abstract

Capability analysis is a very important part of the Measure phase in a Six Sigma project. It is also part of classical statistical process control. Through capability analysis we can measure how the process performance fits the customer/client requirements. These requirements must be translated into the specification limits for the characteristic of interest. Over the years, many advances have been made, especially regarding nonnormality, nonlinearity, processes with multiple characteristics, and many others. In this chapter, we will gradually go over the specifications, process performance, their relationship, and the capability indices. We will illustrate the concepts through a practical example.