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The LP Procedure

The Reduced Costs, Dual Activities, and Current Tableau

The evaluation of reduced costs and the dual activities is independent of problem structure. For a basic solution, let be the matrix composed of the basic columns of and let be the matrix composed of the nonbasic columns of . The reduced cost associated with the th variable is


and the dual activity of the th row is


The Current Tableau is a section displayed when you specify either the TABLEAUPRINT option in the PROC LP statement or the TABLEAU option in the PRINT statement. The output contains a row for each basic variable and a column for each nonbasic variable. In addition, there is a row for the reduced costs and a column for the product


This column is labeled INV(B)*R. The body of the tableau contains the matrix

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