Fuzzy Testing and Selecting the Better Manufacturing Process Using Loss-Based Capability Index

The loss-based process capability index C_pm sometimes called the Taguchi index. In practice, Taghchi index is estimated using sample data, thus it is of interest to obtain confidence limits of estimate C_pm far assessing processes. Most of the traditional methods for measuring the manufacturing process capability are based on crisp estimates of C_pm wherein the output process measurements are precise. In the present study, we investigate the more realistic in general that the output of data from measurement of the quality of a product Is insufficiently precise. The fuzzy hypothesis testing on the fuzzy estimator of C_pm for finding process performance is proposed. We also considered the real-world problems in selecting the better manufacturing/supplier process from several available manufacturing/supplier processes