International Journal of Pure and Applied Mathematics Volume 119 No. 3 2018, 491-500 ISSN: 1311-8080 (printed version); ISSN: 1314-3395 (on-line version) url: http://www.ijpam.eu doi: 10.12732/ijpam.v119i3.9 P A ijpam.eu GROUP CHAIN SAMPLING PLANS BASED ON TRUNCATED LIFE TEST FOR EXPONENTIAL DISTRIBUTION Mohd Azri Pawan Teh 1 § , Nazrina Aziz 2 , Zakiyah Zain 3 1,2,3 School of Quantitative Sciences (SQS) College of Arts and Sciences Universiti Utara Malaysia 06010 Sintok, Kedah, MALAYSIA 2 Institute of Strategic Industrial Decision Modeling (ISIDM) School of Quantitative Sciences (SQS) College of Arts and Sciences Universiti Utara Malaysia 06010, Sintok, Kedah, MALAYSIA 3 Centre for Testing Measurement and Appraisal (CeTMA)) Universiti Utara Malaysia 06010 Sintok, Kedah, MALAYSIA Abstract: This paper develops group chain sampling plans (GChSP) for Exponential dis- tribution when the life test is truncated at a pre-assumed time. The performances of the GChSP such as the number of minimum groups, g and probability of lot acceptance, L(p) are calculated by satisfying the consumers risk, β at a certain speciﬁed design parameter. Quality parameter is deﬁned in terms of mean with assumptions that the test termination time, t0, the speciﬁed constant, a, the number of allowable preceding lots, i and the number of products, r are pre-ﬁxed. An example is provided for illustrative purpose for the GChSP. The article continues with performances comparison between the GChSP and the group sampling plan (GASP). The article concludes that the GChSP has better performances compared to the GASP in terms of the number of minimum groups, g, the probability of lot acceptance, L(p), the cost and the inspection time. Received: November 3, 2017 Revised: July 16, 2018 Published: July 17, 2018 c  2018 Academic Publications, Ltd. url: www.acadpubl.eu § Correspondence author