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The Reduced Costs, Dual Activities, and Current Tableau
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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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