Unformatted text preview: Page l2 Infeasible Solution
l l Optimal Solution A set of inputs (decision variables) in
which one or more of the problem
constraints is violated.
Infeasible solutions, though easy to
find, are worthless. l l l l Solving Complex OR Models Complexity of OR Models
l l The number of iterations needed to
solve an OR problem depends on the
complexity of the particular model.
A problem may be so complex that no
mathematical algorithms exist to solve
it in a reasonable amount of time. l l l l Operations Research Software
l l l l l l A feasibie solution which best
achieves the management objectlve
criterion.
An optimal solution may not exist in
many probiems.
No other feasible solution can be found
which will improve upon an optimal
solution.
An optimal solution is usually sougM
using an iterative process. New mathematical algorithms may be
developed.
The probiem may be simplified to
facilitate solution wtth existing
algorithms.
Simuiation can often be used when OR
models are unsatisfactory.
The tradeoff between cost of accurate
soiution and reduced beneftt of
simplified model should be considered. TORA Software Package Shareware Programs
General Purpose Commercial Software
Specitic Problem Soiving Sofhvare
Custom Software
Spreadsheet Optimization
TORA Software Package included in
Textbook l l l Inexpensive
User Friendly (somewhat)
Operates on wide variety of hardware
conftgurations
 IBM WXTIAT Compatible or Hlghw with 512K RAM
 Ms.Oos 3.2 or Lat.,
 b,,‘” Floppy Disk Drive and Har...
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 Spring '94
 DonaldC.Johnson
 Operations Research, Optimization, Complex OR Models, Mathematkal Model, TORA Software Package

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