On the rectifying multiple deferred state plan in the presence of uncertain parameter

Abstract

The quality of manufactured products plays a very important role in increasing consumer satisfaction. One approach to improving outgoing lot quality is applying screening method. In this paper, a multiple deferred state sampling plan is presented for a unilateral-univariate normal process with imprecise process quality in the presence of the rectifying inspection. To assess the performance of the proposed plan, a mathematical model is derived for calculating the fuzzy average total inspection ( $\widetilde{\mathrm{ATI}}$ ) under the operation of the proposed plan. The obtained conclusions indicate that the proposed plan is more economical than the existing plans in terms of $\widetilde{\mathrm{ATI}}$ measure. A numerical example is given to demonstrate how to apply the introduced plan in the real world.