╨╧рб▒с>■  ■                                                                                                                                                                                                                                                                                                                                                                                                                                                   ¤   ■                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           Root Entry            ■                                       Root Entry        *0_Ъю╧╗Є└Ё^P╢Tес№─Contents            ═                                ■   ¤   ■   ■                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                ■                                                                                                                                                                                                                                                                                                                                                                                                   ьЛ{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fnil\fcharset0 Courier New;}} {\colortbl ;\red0\green0\blue255;\red0\green0\blue0;\red0\green175\blue0;} \viewkind4\uc1\pard\cf1\f0\fs20 MODEL\cf2 : \par \cf1 TITLE\cf2 : Kibbutzim ; \par \cf3 ! This Lingo formulation of the linear program is scalable. \par Adding a crop or kibbutz is easy with this model than it \par is with the LINDO formulation. The scalable model allows a \par small version of a model to be tested. Then, entries in the \par data section could be changed to the actual situation being modeled;\cf2 \par \par \cf1 SETS\cf2 : \cf3 ! The structure of the data;\cf2 \par Crop : Quota, Water, Return; \par Kibbutz : Acres, WaterA; \par Alloc(Crop, Kibbutz) : X; \par \cf1 ENDSETS\cf2 \par \par \cf1 DATA\cf2 : \cf3 ! The actual data for this instance;\cf2 \par Crop, Quota, Water, Return = \par Beets 600 3 1000 \par Cotton 500 2 750 \par Sorg 325 1 250; \par \par Kibbutz, Acres, WaterA = \par K1 400 600 \par K2 600 800 \par K3 300 375; \par \cf1 ENDDATA\cf2 \par \par [NetReturn] \cf1 MAX\cf2 = \cf1 @SUM\cf2 (Crop (i) : Return(i) * \cf1 @Sum\cf2 (Kibbutz (j) : \par X(i,j))); \par \par \cf1 @FOR\cf2 (Kibbutz(j) : \par [Land] \cf1 @SUM\cf2 (Crop(i) : X(i,j)) <= Acres(j); \par [WaterLim] \cf1 @SUM\cf2 (Crop(i) : Water(i) * X (i,j)) <= WaterA(j); \par ); \par \par \cf1 @FOR\cf2 (Crop(i) : \par [TAcre] \cf1 @SUM\cf2 (Kibbutz(j) : X(i,j)) <= Quota(i); ); \par \par \cf1 @FOR\cf2 (Kibbutz(j) : \par \cf1 @FOR\cf2 (Kibbutz(k) | k #EQ# j + 1: \par [Dist] Acres(k) * \cf1 @SUM\cf2 (Crop(i) : X(i,j)) \par = Acres(j) * \cf1 @SUM\cf2 (Crop(i) : X(i,k)); \par ) ); \par \cf1 END\cf2 \par \par \cf3 !A student version of LINGO can be downloaded \par from: http://www.lindo.com;\cf2 \par \par \par \par \par }