****************************************************
*   RARDIN, OPTIMIZATION IN O.R., P.131-134        *
*   BLENDING MODEL                                 *
*   EXAMPLE 4.2 - SWEDISH STEEL ALLOCATION MODEL   *
*   DSN = R135.SAS                                 *
****************************************************;



DATA NEW;
INPUT _TYPE_ $  _ROW_ $  _COL_ $ _COEF_;
CARDS;
MIN       COST         .                          .
.         COST         X1                      16.0
.         COST         X2                      10.0
.         COST         X3                       8.0
.         COST         X4                       9.0
.         COST         X5                      48.0
.         COST         X6                      60.0
.         COST         X7                      53.0
EQ        WEIGHT       X1                       1.0
.         WEIGHT       X2                       1.0
.         WEIGHT       X3                       1.0
.         WEIGHT       X4                       1.0
.         WEIGHT       X5                       1.0
.         WEIGHT       X6                       1.0
.         WEIGHT       X7                       1.0
.         WEIGHT       _RHS_                 1000.0
GE        CAR-LW       X1                    0.0080
.         CAR-LW       X2                    0.0070
.         CAR-LW       X3                    0.0085
.         CAR-LW       X4                    0.0040
.         CAR-LW       _RHS_                    6.5
LE        CAR-UP       X1                    0.0080
.         CAR-UP       X2                    0.0070
.         CAR-UP       X3                    0.0085
.         CAR-UP       X4                    0.0040
.         CAR-UP       _RHS_                    7.5
GE        NIC-LW       X1                    0.1800
.         NIC-LW       X2                    0.0320
.         NIC-LW       X5                    1.0000
.         NIC-LW       _RHS_                   30.0
LE        NIC-UP       X1                    0.1800
.         NIC-UP       X2                    0.0320
.         NIC-UP       X5                    1.0000
.         NIC-UP       _RHS_                   35.0
GE        CHR-LW       X1                    0.1200
.         CHR-LW       X2                    0.0110
.         CHR-LW       X6                    1.0000
.         CHR-LW       _RHS_                   10.0
LE        CHR-UP       X1                    0.1200
.         CHR-UP       X2                    0.0110
.         CHR-UP       X6                    1.0000
.         CHR-UP       _RHS_                   12.0
GE        MOL-LW       X2                    0.0010
.         MOL-LW       X7                    1.0000
.         MOL-LW       _RHS_                   11.0
LE        MOL-UP       X2                    0.0010
.         MOL-UP       X7                    1.0000
.         MOL-UP       _RHS_                   13.0
LE        X1-AVL       X1                       1.0
.         X1-AVL       _RHS_                   75.0
LE        X2-AVL       X2                       1.0
.         X2-AVL       _RHS_                  250.0
;
PROC LP SPARSEDATA ;
    TITLE 'SWEDISH STEEL BLENDING PROBLEM';



RUN;