A bottling process sometimes results in overfills or underfills. Overfills are especially damaging to the equipment. Which process capability index would this company most want to monitor? A) C_p B) C_pl C) C_pu D) C_pk

Question

Quizplus · Accepted Answer

The process capability index that measures the upper specification limit (USL) deviation from the process mean is CPK, and the process capability index that measures the lower specification limit (LSL) deviation from the process mean is CPL. However, in this scenario, the company is specifically concerned with the overfills, which means they want to monitor the deviation from the USL only, not the LSL. Therefore, the best choice would be C_pu, which represents CPK (pu) for a one-sided specification limit (USL).

A Bottling Process Sometimes Results in Overfills or Underfills