Article ID: | iaor2002826 |
Country: | United States |
Volume: | 30 |
Issue: | 2 |
Start Page Number: | 133 |
End Page Number: | 142 |
Publication Date: | Feb 1998 |
Journal: | IIE Transactions |
Authors: | Kobza J.E., Shen Y.C., Reasor R.J. |
Keywords: | automated guided vehicles |
Empty-vehicle travel time plays an important role in the design and control of automated guided vehicle systems (AGVSs). However, many analytical models of these systems assume the amount of empty-vehicle travel time is the same as the loaded-vehicle travel time. This paper examines empty-vehicle travel time in AGVSs with low traffic intensity. The model uses a discrete-time Markov chain based on vehicle location and represents dispatching rules in the one-step transition matrix. The model can be used to compute moments and cumulative probabilities for the empty-vehicle travel time. Coupled with the loaded-vehicle travel time and the loading/unloading time, similar results can be obtained for the time to service a load request.