Selected Examples

Assembly

In a model of manufacturing systems, there is often assembly of subunits into larger units. The assembly cannot occur unless all of the subunit pieces are available. An important component for modeling this behavior is the Adder.

Figure 9.19: Assembly Unit

Figure 9.19 shows the assembly of two subunits into a larger unit. Each subunit line produces components as modeled by servers 1 and 2. These subunits queue in the buffers at the end of the subunit assembly lines. When the multiple server is free, it requests a transaction from the Adder. The Adder requests one transaction from each of the lines going into it. If there is a transaction available from each of these lines, then it requests one. When all the transactions have arrived at the Adder, it generates a new transaction, which is sent down the arc to the multiple server.

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