An approximate model for base-stock-controlled assembly systems

Avşar, Zeynep Müge
This study is on continuously reviewed base-stock-con trolled assembly systems with Poisson demand arrivals and exponential single-server facilities used for manufacturing and assembly operations. A partially aggregated but exact queueing model is developed and approximated assuming that the state-dependent transition rates arising as a result of the partial aggregation are constant. It is shown that the steady-state probability distribution of this approximate model is a product-form distribution for the simplest case with two components making up an assembly. Based on this analytical observation, similar product-form distributions are proposed for more complex assembly systems. Comparisons with simulation and matrix-geometric solutions show that the proposed product-form steady-state distributions accurately approximate relevant performance measures with a considerable advantage in terms of the required computational effort. A greedy heuristic is devised to use approximate steady-state probabilities for optimizing design parameters like base-stock levels.


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Gullu, R; Onol, E; Erkip, N (Informa UK Limited, 1997-08-01)
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Citation Formats
Z. M. Avşar and U. RODOPLU, “An approximate model for base-stock-controlled assembly systems,” IIE TRANSACTIONS, pp. 260–274, 2009, Accessed: 00, 2020. [Online]. Available: