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1 2025

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A flexible resubmitted variable sampling plan for product quality determination using the process loss index

Darmawan Armin, Bahri Syamsul, Amar Kifayah, Do Bagus Muhammad Reza, Tahir Nurfaidah

Production Engineering Archives

2025

Vol. 31, Iss. 2

201--211

This research aims to develop a flexible resubmitted sampling plan (RSP) incorporating a process loss index for variable inspection. This model will effectively address product specifications that are affected by variations in target value and lot fraction non-conformance as well. This method is specially designed for quality characteristics that have a normal distribution and are subject to double specification limits. This article outlines the plan parameters by utilizing the common two-point condition on the operating characteristic curve. This criterion ensures that the strategy will satisfy the quality requirements and acceptable risk levels for both the customer and the manufacturer. An analysis is conducted to evaluate the performance of the proposed sampling plan and compare it to the characteristics of the typical single-sample plan. The proposed method enables a reduction in the sample size that is tested while maintaining an equal level of protection for both the manufacturer and the consumer. Tables comprising the plan parameters are available for practical use and organized according to specified quality standards and degrees of risk. Moreover, an example illustrating the operational method is provided to verify the proposed approach.