In this applet, e1, e2, e3, e4 are the epsilons explained in Chapter 3. In order to figure out which variables leave the basis, you need to remember that the epsilons are part of the current basic variable values and that e1 >> e2 >> e3 >> e4.
Each problem must be solved using the Simplex Method. Any attempt to make an incorrect pivot will be rejected but your score will be increased by one. Low scores are better than high scores.
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 the wrong set of problems 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, press the Go Pivoting button and then, when the pivot window pops up, press the Start button.
Don't forget that incorrectly pressing one of the termination buttons (Optimal or Unbounded) 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 this online assignment is due you must go to the end and submit a score.
Comment on Usage. If you press the Go Pivoting button twice, then you will get two windows that are initially identical. This is convenient since you can let one window lag behind the other by one iteration and thereby watch your pivots better.