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Solving LP’s using Microsoft Excel™

Solving LP’s using Microsoft Excel™. Common LP Solvers: Commercial: LINDO, CPLEX, AMPL, OSL, … Free software: Several available on web, e.g. try: google search: java LP solver. Setting up Microsoft Excel™. Step 0: Link the solver libraries

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Solving LP’s using Microsoft Excel™

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  1. Solving LP’s using Microsoft Excel™ Common LP Solvers: Commercial: LINDO, CPLEX, AMPL, OSL, … Free software: Several available on web, e.g. try: google search: java LP solver

  2. Setting up Microsoft Excel™ Step 0: Link the solver libraries MS Excel  Tools  Add-Ins…  Solver Add In Step 1. Set up the Problem data Step 2. Set up the solver data Step 3. Solve Step 4. Study results

  3. z( x, y) = 15 x + 10y Step 1. Set up problem data max z( x, y) = 15 x + 10y [objective] s.t. 2x + y ≤ 1500 [Urea] x + y ≤ 1200 [Potash] x ≤ 500 [Rock phosphate] x ≥ 0, [non-negativity] y ≥ 0 [non-negativity]

  4. 2x + y ≤ 1500 [Urea] Step 1. Set up the Problem Data max z( x, y) = 15 x + 10y [objective] s.t. 2x + y ≤ 1500 [Urea] x + y ≤ 1200 [Potash] x ≤ 500 [Rock phosphate] x ≥ 0, [non-negativity] y ≥ 0 [non-negativity]

  5. Step 2. Set up the Solver Data Step 2.1 Tools  Solver… Step 2.2 Objective function

  6. Step 2. Set up the Solver Data.. Step 2.3 Specifying the variables

  7. Step 2. Set up the Solver Data… Step 2.4 Specifying the constraints

  8. Step 3. Solve Complete problem specification

  9. Step 4. Study the results How much Type A to produce Optimum profit How much Type B to produce How much raw material we should order These reports give some more useful information

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