Title: An EOQ model for non-instantaneous deteriorating items with ramp-type demand in a two-warehouse facility

Authors: Ahmad Hasan; Amrina Kausar; Mona Verma

Addresses: Faculty of Mathematical Sciences, Department of Operational Research, University of Delhi, Delhi – 110007, India ' Department of Management Studies, Shaheed Sukhdev College of Business Studies, University of Delhi, Delhi – 110089, India ' Department of Management Studies, Shaheed Sukhdev College of Business Studies, University of Delhi, Delhi – 110089, India

Abstract: The present study develops an EOQ model for non-instantaneous deteriorating items, having ramp-type demand in a two-storage facility under partially backlogged shortages. Here, it is supposed that the items are non-instantaneously deteriorating in nature, i.e., the deterioration in them does not start immediately but starts after a time lag. Moreover, demand rate is supposed to be increasing initially and stable thereafter. This type of demand pattern is known as 'ramp-type demand'. The aim of the model is to minimise the total cost by jointly optimising the cycle length and time at which the rented warehouse gets exhausted. The numerical analysis and sensitivity analysis is carried to demonstrate the model characteristics.

Keywords: non-instantaneous deterioration; ramp-type demand; two-warehouse; shortages; EOQ; inventory model; capacity constraint; storage facility.

DOI: 10.1504/IJSOI.2021.117264

International Journal of Services Operations and Informatics, 2021 Vol.11 No.2/3, pp.115 - 158

Received: 25 Apr 2020
Accepted: 30 Nov 2020
Published online: 26 Aug 2021 *

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