The Tableau button lets you run the algorithm one iteration at a time. From the input data, the program creates a first Simplex tableau as shown below.

**Radio buttons** allow the user to select the entering
and/or the exiting variable. The program verifies

- If the entering variable is not already in base
- If the pivot is not equal to zero

The method does not verify if the choice of entering/exiting variable leads to a feasible solution.

**NEXT** button performs one iteration of the Simplex
method. If entering and/or exiting variable is not selected, the
method determines them.

**Remarks:**

**M**indicates a large value.- Xi represents a decision variable. Sj represents a slack or an artificial variable.
- Uses the
**big M**if Xi = 0, for all i, is not a feasible solution. - Uses the upper-bounding technique.