• Ranjana Gupta
• Meenakshi Srivastava

ABSTRACT: Economic Production Quantity (EPQ) model is generally used by the researchers in production inventory management to assist in making decision on production lot size. In most of the cases, it is assumed that all items or units produced are perfectly good. But practically, defective or imperfect units are produced in each cycle of production. They must be screened out before delivery to the customers through a 100% screening process, which produces some reworkable, some non-reworkable but slightly defective and scrap items besides the major perfectly good items. Keeping this view in mind, present paper proposes an Economic Production Quantity (EPQ) model for deteriorating and imperfect quality items with varying demand. To achieve this objective a mathematical model is developed with optimal production lot size which minimizes the total cost of the system. Numerical illustration and sensitivity analysis are also carried out to analyze the performance of the model.

Keywords: EPQ, Imperfect quality, Inventory, Reworkable, Deteriorating items.

"A Modified EPQ Model for Deteriorating Items Having Varying Demand With Imperfect Production System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.496-506, April-2019, Available :http://www.jetir.org/papers/JETIR1904P79.pdf

"A Modified EPQ Model for Deteriorating Items Having Varying Demand With Imperfect Production System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp496-506, April-2019, Available at : http://www.jetir.org/papers/JETIR1904P79.pdf