Process Capability Estimation in Fuzzy Environment

Process capability indices can be viewed as the effective and excellent means of measuring product quality and process performance. They are very useful statistical tools to summarize process dispersion and location by using process capability analysis. However, there are some limitations which prevent a deep and flexible analysis because of the crisp definition of quality and precise definition of data. In this paper, a flexible version of PCIs is proposed which is able to measure the process capability base on fuzzy quality and fuzzy data.

Keywords:

Fuzzy quality , Normal fuzzy number , Process capability indices