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

Below is a java applet that will present a set of linear programming
problems for you 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,
press the *Submit* button to email your score to your instructor
(whose email address must be supplied below).

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 taking the wrong exam and it will be impossible to fairly evaluate your performance.

Also, be sure to enter your email address and your instructor's email address.

When you are ready to begin the exam, press the *Go Pivoting* button
and then, when the pivot window pops up, press the *Start* button.

After finishing the exam (by pressing the *Submit* button) it would be a
good idea to send a separate email message to your instructor indicating what
score you saw indicated at the bottom of the pivot window.

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 the
*Exit* button to quit the exam. At that point you can start afresh.
Of course, at some time before the established deadline you must go to the end
and submit a score.

**
Bugs.
**
This applet works fine when accessed via Netscape3 on most UNIX workstations
and it works fine with either Netscape4 or InternetExplorer4 on WindowsNT. Most other
browser/platform combinations do not work correctly. The problem seems
to be due to bugs in the browser's JAVA interpreter
as implemented on the given platform.
If you have trouble getting the applet to behave as described above, try
finding a different browser/platform combination.