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In Just-in-time (JIT) production system, labor or forklifts are
widely used for material handling. In addition, kanban system
are implemented to obtain production efficiency of pull
strategy and to maintain low level of inventory. To replace
forklift with Automated Guide Vehicle System (AGVS),
information transfer of kanban systems should be changed for
automatic material handling equipments. This thesis presents
AGVS implementation procedures for JIT systems. The introduced
AGVS is dispatched by input and output thresholds imposed on
the input and output queues of work stations. Threshold values
are computed based on process time. The physical states of
queues are detected by sensing devices and compared with
thresholds to dispatch vehicles. Methematical model is used to
ca;culate required number of vehicles. Three guided-path models
of AGVS are introduced: chessboard unidirectional, tandem bi-
directional, and cyclic bi-directional guided-path models.
Simulation models are setablished to updated by analyzing the
simulation results. Moreover, based on the performance
evaluation, the best guided -path model should be adopted for
actual system implementation. The throughput and average
process inventory.
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