lp-example-2010

lp-example-2010 - Using Excel for LP. 1. Enter the data...

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Using Excel for LP. 1. Enter the data from my sample plan. Set up a column for each enterprise (corn, soybeans, peanuts, cotton, winter stockers, summer stockers and cow-calf) and a row for each constraint (cropland, winter land, rotation limit, pasture, and 12 labor restrictions). Fill in the tableau using the numbers in my example. Corn Soy Peanuts Cotton Stks-w Stks-s CC Type RHS OBJ 41.72 125.98 70.97 91.60 97.01 28.66 27.54 cropland 1 1 1 1 LE 905 winter-land 1 1 0.54 LE 905 pnt-rot -0.5 1 -0.5 LE 0 pasture 0.26 2 LE 258 labor-jan 0 0 0 0 0.5 0 1.4625 LE 649.5 labor-feb 0 0 0 0 0.5 0 1.3 LE 649.5 labor-mar 0.1 0 0.1 0 0.4 0 0.9375 LE 649.5 labor-apr 0.2 0.25 0.3 0.2 0.4 0 0.6625 LE 649.5 labor-may 0.2 0.2 0.6 0.65 0.8 0.9 0.6375 LE 649.5 labor-jun 0 0.1 0.5 0.75 0 0.6 0.6375 LE 649.5 labor-july 0 0 0.3 0.15 0 0.6 0.6625 LE 649.5 labor-aug 0 0 0.3 0.15 0 0.6 0.2 LE 649.5 labor-sept 0.3 0 2.2 0.15 0 0.6 0.2375 LE 649.5 labor-oct 0 0.25 0.2 1 0.6 0.9 0.6625 LE 649.5 labor-nov 0 0 0 0.2 0.4 0 0.3375 LE 649.5 labor-dec 0 0 0 0 0.5 0 1.5 LE 649.5 2. Put a label called "used" on the column beside RHS 3. Put a label called "answers" on a row below the last restraint. You should have something similar to the tableau below. (Note that I have shaded some boxes to help keep my formulas straight, later on.) Corn Soy Peanuts Cotton Stks-w Stks-s CC Type RHS USED OBJ 103.86 233.79 230.68 223.45 97.01 28.66 27.54 MAX cropland 1.00 1.00 1.00 1.00 LE 720 winter-land 1.00 1.00 0.54 LE 720 pnt-rot -0.50 1.00 -0.50 LE 0 pasture 0.26 2.00 LE 380 labor-jan 0 0 0 0 0.50 0.00 1.46 LE 649.5 labor-feb 0 0 0 0 0.50 0.00 1.30 LE 649.5 labor-mar 0.2 0 0.2 0 0.40 0.00 0.94 LE 649.5 labor-apr 0.4 0.55 0.5 0.3 0.40 0.00 0.66 LE 649.5 labor-may 0.4 0.44 0.9 0.9 0.80 0.90 0.64 LE 649.5 labor-jun 0 0.22 0.8 1.2 0.00 0.60 0.64 LE 649.5 labor-july 0 0 0.7 0.3 0.00 0.60 0.66 LE 649.5 labor-aug 0 0 0.45 0.3 0.00 0.60 0.20 LE 649.5 labor-sept 0.6 0 3.4 0.2 0.00 0.60 0.24 LE 649.5 labor-oct 0 0.54 0.3 1.3 0.60 0.90 0.66 LE 649.5 labor-nov 0 0 0 0.5 0.40 0.00 0.34 LE 649.5 labor-dec 0 0 0 0 0.50 0.00 1.50 LE 649.5 ANSWERS Table 4. Basic Linear Programming Model for Farm Planning, 2010
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lp-example-2010 - Using Excel for LP. 1. Enter the data...

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