In this paper, a model of a supply chain system is constructed, and a mathematical model of three control mechanisms, push and pull controls, and a hybrid control of both controls, is formulated. For the three control mechanisms, the variance of processing quantities at each process and the variance of inventory levels at each inventory station are analysed as performance measures. The effects of the number of branches in each stage, the lead time of each transportation process, and the autocorrelation of demand, are numerically investigated. In addition, by comparing the totals of the variances for the three control mechanisms, it is identified and presented that the hybrid control is superior to the others.
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