Quantifying the risk in age and block replacement policies / B. C. Giri in Journal of the operational research society (JORS), Vol. 61 N° 7 (Juillet 2010)  

Public ISBD [article]  inJournal of the operational research society (JORS) > Vol. 61 N° 7 (Juillet 2010) . - pp. 1151–1158 Titre : Quantifying the risk in age and block replacement policies Type de document : texte imprimé Auteurs : B. C. Giri, Auteur ; T. Dohi, Auteur Année de publication : 2011 Article en page(s) : pp. 1151–1158 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Preventive maintenance Risk Age Block replacement policies Index. décimale : 001.424 Résumé : Preventive maintenance policies have been studied in the literature without considering the risk due to the cost variability. In this paper, we consider the two most popular preventive replacement policies, namely, age and block replacement policies under long-run average cost and expected unit time cost criteria. To quantify the risk in the preventive maintenance policies, we use the long-run variance of the accumulated cost over a time interval. We numerically derive the Risk-sensitive preventive replacement policies and study the impact of the Risk-sensitive optimality criterion on the managerial decisions. We also examine the performance of the expected unit time cost criterion as an alternative to the traditional long-run average cost criterion. DEWEY : 001.424 ISSN : 0361-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n7/abs/jors200940a.html [article] Quantifying the risk in age and block replacement policies [texte imprimé] / B. C. Giri, Auteur ; T. Dohi, Auteur . - 2011 . - pp. 1151–1158. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 7 (Juillet 2010) . - pp. 1151–1158 Mots-clés : Preventive maintenance Risk Age Block replacement policies Index. décimale : 001.424 Résumé : Preventive maintenance policies have been studied in the literature without considering the risk due to the cost variability. In this paper, we consider the two most popular preventive replacement policies, namely, age and block replacement policies under long-run average cost and expected unit time cost criteria. To quantify the risk in the preventive maintenance policies, we use the long-run variance of the accumulated cost over a time interval. We numerically derive the Risk-sensitive preventive replacement policies and study the impact of the Risk-sensitive optimality criterion on the managerial decisions. We also examine the performance of the expected unit time cost criterion as an alternative to the traditional long-run average cost criterion. DEWEY : 001.424 ISSN : 0361-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n7/abs/jors200940a.html

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Supply chain model for a deteriorating product with time-varying demand and production rate / B. C. Giri in Journal of the operational research society (JORS), Vol. 63 N° 5 (Mai 2012)  

Public ISBD [article]  inJournal of the operational research society (JORS) > Vol. 63 N° 5 (Mai 2012) . - pp. 665–673 Titre : Supply chain model for a deteriorating product with time-varying demand and production rate Type de document : texte imprimé Auteurs : B. C. Giri, Auteur ; T. Maiti, Auteur Année de publication : 2012 Article en page(s) : pp. 665–673 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Supply chain Vendor–buyer Time-varying demand Deterioration Process shift Index. décimale : 001.424 Résumé : The paper develops a two-echelon supply chain model with a single-buyer and a single-vendor. The buyer sells a seasonal product over a short selling period and its inventory is subject to deterioration at a constant rate over time. The vendor's production rate is dependent on the buyer's demand rate, which is a linear function of time. Also, the vendor's production process is not perfectly reliable; it may shift from an in-control state to an out-of-control state at any time during a production run and produce some defective (non-conforming) items. Assuming that the vendor follows a lot-for-lot policy for replenishment made to the buyer, the average total cost of the supply chain is derived and an algorithm for finding the optimal solution is developed. The numerical study shows that the supply chain coordination policy is more beneficial than those policies obtained separately from the buyer's and the vendor's perspectives. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n5/abs/jors201154a.html [article] Supply chain model for a deteriorating product with time-varying demand and production rate [texte imprimé] / B. C. Giri, Auteur ; T. Maiti, Auteur . - 2012 . - pp. 665–673. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 5 (Mai 2012) . - pp. 665–673 Mots-clés : Supply chain Vendor–buyer Time-varying demand Deterioration Process shift Index. décimale : 001.424 Résumé : The paper develops a two-echelon supply chain model with a single-buyer and a single-vendor. The buyer sells a seasonal product over a short selling period and its inventory is subject to deterioration at a constant rate over time. The vendor's production rate is dependent on the buyer's demand rate, which is a linear function of time. Also, the vendor's production process is not perfectly reliable; it may shift from an in-control state to an out-of-control state at any time during a production run and produce some defective (non-conforming) items. Assuming that the vendor follows a lot-for-lot policy for replenishment made to the buyer, the average total cost of the supply chain is derived and an algorithm for finding the optimal solution is developed. The numerical study shows that the supply chain coordination policy is more beneficial than those policies obtained separately from the buyer's and the vendor's perspectives. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n5/abs/jors201154a.html

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