An order-level inventory model is developed for deteriorating items with uniform rate of production and stock-dependent demand. Shortages are allowed, and excess demand is backlogged. Results are illustrated with numerical examples. © 1989 Operational Research Society Ltd.

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University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Journal of the Operational Research Society

The effect of advertising media and sales effort on future demand of merchandize is considered. In an oligopolistic marketing system, it is quite natural to boost sales by using advertising and sales effort to earn more money from a business sector. Determination of demand and costs due to advertising and sales effort is quite difficult. The approach in this paper is to concentrate on investment for the purpose of advertising and increasing sales effort in order to maximize profit. The paper extends an inventory model over finite and infinite time horizons where demand is influenced by the level of stock, advertising media and sales effort. The associated profit maximization problem is solved by the 'Euler-Lagrange method'. The model is illustrated with a numerical example.

Journal	Journal of the Operational Research Society
Publisher	STOCKTON PRESS
ISSN	0160-5682