en قابلیت اطمینان Reliability and Maintenance پژوهشي Research The subjects of reliability acceptance sampling plans and failure-censored life tests have usually been investigated from the viewpoint of statistical properties; indeed, few researchers have shed light on the economic aspects of these issues. In this research, a constrained mathematical model is developed to optimally design a reliability sampling plan under failure censoring life testing. Minimizing the expected total cost (<em>ETC</em>) involved in the sampling and life testing is considered as the objective function of the model. Ensuring the producer&rsquo;s and the consumer&rsquo;s risks is taken into consideration as the constraint of the model. To minimize the <em>ETC</em>, the model optimally determines three decision variables including the total number of the items put to the life test, the number of the failed items to terminate the test, and a criterion to make decisions about the acceptance or rejection of the lot. Examples are provided and analyses are conducted to gain some insight regarding the model performance.&nbsp; Reliability, Lifetime, Life testing, Acceptance sampling plan 0 0 http://ijiepr.iust.ac.ir/browse.php?a_code=A-10-1972-1&slc_lang=en&sid=1 Hasan Rasay h.rasay@kut.ac.ir 180031947532846006820 180031947532846006820 Yes Assitant Professor of Industrial Engineering; Kermanshah University of Technology Amir-Mohammad Golmohammadi a-golmohammadi@araku.ac.ir 180031947532846006821 180031947532846006821 No Arak University