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Dynamic server assignment policies for assembly‐type queues with flexible servers

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  • Yi‐Chun Tsai
  • Nilay Tanık Argon

Abstract

We seek dynamic server assignment policies in finite‐capacity queueing systems with flexible and collaborative servers, which involve an assembly and/or a disassembly operation. The objective is to maximize the steady‐state throughput. We completely characterize the optimal policy for a Markovian system with two servers, two feeder stations, and instantaneous assembly and disassembly operations. This optimal policy allocates one server per station unless one of the stations is blocked, in which case both servers work at the unblocked station. For Markovian systems with three stations and instantaneous assembly and/or disassembly operations, we consider similar policies that move a server away from his/her “primary” station only when that station is blocked or starving. We determine the optimal assignment of each server whose primary station is blocked or starving in systems with three stations and zero buffers, by formulating the problem as a Markov decision process. Using this optimal assignment, we develop heuristic policies for systems with three or more stations and positive buffers, and show by means of a numerical study that these policies provide near‐optimal throughput. Furthermore, our numerical study shows that these policies developed for assembly‐type systems also work well in tandem systems. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008

Suggested Citation

  • Yi‐Chun Tsai & Nilay Tanık Argon, 2008. "Dynamic server assignment policies for assembly‐type queues with flexible servers," Naval Research Logistics (NRL), John Wiley & Sons, vol. 55(3), pages 234-251, April.
    • Handle: RePEc:wly:navres:v:55:y:2008:i:3:p:234-251
    DOI: 10.1002/nav.20281
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    References listed on IDEAS

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