Estimation of the fleet size for a multi-load automated guided vehicle system

P. C. Hung*, Fuh-Hwa Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


One of the important factors to determine during the early design stage for an automated guided vehicle system (AGVS) is the fleet size required for material handling activities. Although several analytical methods have been used to estimate the vehicle requirement for single-load AGVS, there are few reports on the same topic for multi-load vehicles. The dynamic behavior of multi-load vehicles whereby they can carry more than one job at a time makes fleet size estimation a complicated task. In this paper, an analytical method is proposed to estimate the number of multi-load vehicles needed to perform a given level of job handling in a job shop environment. Several methods for estimating the number of single-load vehicles are modified. Finally, simulation methodology is used to obtain the actual fleet size for an illustrative example under different vehicle dispatching rules. The results indicate that the proposed model can provide results that are close to the simulation results.

Original languageEnglish
Pages (from-to)244-253
Number of pages10
JournalProceedings of the National Science Council, Republic of China, Part A: Physical Science and Engineering
Issue number4
StatePublished - 1 Jul 2001


  • Analytical model
  • Fleet size
  • Multi-load automated guided vehicle system

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