Process Capability Measurement

Abstract

Assert that capability indices quantify process improvement in a simple way and, when used correctly, provide relevant benchmarks. Considers it important that managers fully understand the power and limitations of this quality tool. Asserts the process is on target when Cp and Cpk are equal. Contends that the observed differences are due to sampling error and that any capability index is simply an estimate of an unknown value. Concludes that the measurement of process capability and the assessment on internal and external suppliers performance using indices, is now widespread. Despite any problems, process capability indices are preferable to many other measures of process or supplier performance.

Citation

Porter, L.J. (1990), "Process Capability Measurement", The TQM Magazine, Vol. 2 No. 6. https://doi.org/10.1108/EUM0000000003058