PROC TRANS

Introduction to Optimization

PROC TRANS

Transportation networks are a special type of network, called bipartite networks, that have only supply and demand nodes and arcs directed from supply nodes to demand nodes. For these networks, data can be given most efficiently in a rectangular or matrix form. The TRANS procedure takes cost, capacity, and lower bound data in this form. The observations in these data sets correspond to supply nodes, and the variables correspond to demand nodes.

$\begin{picture} (360,160) \thicklines \put(65,115){\makebox(0,0)[r]{Cost da... ...(168,10){\makebox(0,0){\_ORTRANS}} \put(168,70){\vector(0,-1){50}}\end{picture}$

Figure 1.6: Input and Output Data Sets in PROC TRANS

The TRANS procedure puts the solution in a single output data set. The details are described in the chapter on the TRANS procedure. As with the other optimization procedures, the TRANS procedure defines a macro variable, named _ORTRANS, that has a character string that describes the solution status.

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