What are process capability/performance statistics?
Process capability/performance statistics (e.g. cp, cpk, Pp, Ppk) are calculated from sample data and used to indicate how the process is performing relative to its specification limits. When certain conditions are satisfied, a pair of statistics like cp and cpk or Pp and Ppk can be used as surrogates for the process fraction defective.
Related Questions
- Since process capability/performance statistics are sensitive to so many conditions, aren there alternative methods available for evaluating a process that are more robust?
- What conditions must be satisfied to validate process capability/performance statistics?
- Whats the difference between process capability and process performance statistics?
