Article: Multiproduct EPQ model with single machine, backordering and immediate rework process Journal: European Journal of Industrial Engineering (EJIE) 2011 Vol.5 No.4 pp.388 - 411 Abstract: Production systems with scrapped and rework items have recently become an interesting subject of research. While most attempts have been focused on finding the optimal production quantity in a simple production system, little work appears on a joint production environment. In this research, two joint production systems in a form of multiproduct single machine with and without rework are studied where shortage is allowed and backordered. For each system, the optimal cycle length, the backordered and production quantities of each product are determined such that the cost function is minimised. Proof of the convexity of the involved objective functions of each model is provided and numerical illustrations are given to demonstrate the applicability of the proposed models. Furthermore, the results obtained by solving the models with and without rework of defective items are compared. Sensitivity analysis and some managerial insights based on the numerical illustration are provided at the end. [Received 27 January 2010; Revised 22 May 2010; Accepted 31 May 2010] Inderscience Publishers - linking academia, business and industry through research

Title: Multiproduct EPQ model with single machine, backordering and immediate rework process

Authors: Ata Allah Taleizadeh; Seyed Jafar Sadjadi; Seyed Taghi Akhavan Niaki

Addresses: Department of Industrial Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran; Department of Industrial Management, Raja University, Nokhbegan Street, Qazvin, Iran. ' Department of Industrial Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran. ' Department of Industrial Engineering, Sharif University of Technology, P.O. Box 11155-9414, Azadi Ave., Tehran 1458889694, Iran

Abstract: Production systems with scrapped and rework items have recently become an interesting subject of research. While most attempts have been focused on finding the optimal production quantity in a simple production system, little work appears on a joint production environment. In this research, two joint production systems in a form of multiproduct single machine with and without rework are studied where shortage is allowed and backordered. For each system, the optimal cycle length, the backordered and production quantities of each product are determined such that the cost function is minimised. Proof of the convexity of the involved objective functions of each model is provided and numerical illustrations are given to demonstrate the applicability of the proposed models. Furthermore, the results obtained by solving the models with and without rework of defective items are compared. Sensitivity analysis and some managerial insights based on the numerical illustration are provided at the end. [Received 27 January 2010; Revised 22 May 2010; Accepted 31 May 2010]

Keywords: inventory control; multiproduct single machines; rework; limited production capacity; backordering; modelling; EPQ; economic production quantity; defective items; joint production.

DOI: 10.1504/EJIE.2011.042738

European Journal of Industrial Engineering, 2011 Vol.5 No.4, pp.388 - 411

Published online: 22 Oct 2014 *

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Title: Multiproduct EPQ model with single machine, backordering and immediate rework process

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