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Kamışlık, Aslı Bektaş; Kesemen, Tülay; Khaniyev, Tahir

Inventory model of type \((s,S)\) under heavy tailed demand with infinite variance. (English) Zbl 1442.60092

Braz. J. Probab. Stat. 33, No. 1, 39-56 (2019).
Summary: In this study, a stochastic process \(X(t)\), which describes an inventory model of type \((s,S)\) is considered in the presence of heavy tailed demands with infinite variance. The aim of this study is observing the impact of regularly varying demand distributions with infinite variance on the stochastic process \(X(t)\). The main motivation of this work is, the publication by J. L. Geluk [Proc. Am. Math. Soc. 125, No. 11, 3407–3413 (1997; Zbl 0897.60091)] where he provided a special asymptotic expansion for renewal function generated by regularly varying random variables. Two term asymptotic expansion for the ergodic distribution function of the process \(X(t)\) is obtained based on the main results proposed by Geluk [loc. cit.]. Finally, weak convergence theorem for the ergodic distribution of this process is proved by using Karamata theory.

MSC:

60K20 Applications of Markov renewal processes (reliability, queueing networks, etc.)
90B05 Inventory, storage, reservoirs

Keywords:

semi-Markovian inventory model of type \((s, S)\); heavy tailed distributions with infinite variance; regular variation; renewal reward process; asymptotic expansion; karamata theorem

Citations:

Zbl 0897.60091
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\textit{A. B. Kamışlık} et al., Braz. J. Probab. Stat. 33, No. 1, 39--56 (2019; Zbl 1442.60092)
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