Having practiced with the
advanced simplex pivot tool,
now it is time to take
stock of how good a pivoter you are.

The applet above will present you a set of linear programming
problems to solve. You're job is to solve each problem (either by
finding an optimal solution or demonstrating that the problem is infeasible or
unbounded). After correctly solving a problem, the applet will immediately
give you a new one. After you have solved all the problems in the set,
make a screen shot of this webpage and email that to your instructor.

Each problem must be solved using the Primal-Phase-I Dual-Phase-II simplex
method.
Any attempt to make an incorrect pivot will be rejected but your score
will be increased by one. As always, low scores are better than high scores.
Within each phase you may use any pivot rule you
like (i.e., largest coefficient, smallest index, etc.).

The set of linear programming problems to be solved
is determined by specifying the number
of rows, the number of columns, the seed,
and the number of problems in the set.
Your instructor will tell you what values to use for these
fields. Make sure that you enter exactly what your instructor tells you for
otherwise you will be doing a different set of problems and it will be impossible
to fairly evaluate your performance.

When you are ready to begin the challenge, press the Go Pivoting button.

Don't forget that pressing the Undo button
counts as an extra pivot in your
score---it does not reduce the pivot count. Also, incorrectly pressing one of
the termination buttons (Optimal, Unbounded, or
Infeasible) counts as an extra pivot, so press these buttons only when
you are confident that it is the correct thing to do.

Final note: if for any reason you wish to start over, you may press your
browser's
reload button to start over.
Of course, at some time before the established deadline you must go to the end
and submit a screenshot.

Finally, click here
for the Java Applet version of this tool.