The application Simplex On Line Calculator
is useful to solve linear programming problems as explained at Mathstools theory sections. It applies two-phase or simplex algorithm when required.

Do not enter slack or artificials variables, Simplex On Line Calculator does it for you.

Also, there is an Android version for Android devices on this link

Simplex On Line Calculator allows user to watch in detail step by step simplex execution and each one phase of two-phase method.

Click here to access Simplex On Line Calculator

# Simplex On Line Calculator. The on-line Simplex method Aplicattion.

### Basic concepts and principles

### Extended Theory

The simplex algorithm performs iterations between the extreme points set of feasible region, checking for each one if Optimalit criterion holds. |

The program window opens with a default problem, which has a finite optimal solution.

Application consists of the following menu:

1)

**Restart**The screen back in the default problem.

2)

**Dualize**Transforms the problem in its dual.

3)

**Add Column**Add a column to constraints matrix (and hence to costs vector).

4)

**Add Row**Add a row to constraints matrix (and therefore to Vector Constraints), ie anand dimension to problem.

5)

**Delete Column**Deletes a column in the matrix (and therefore costs Vector).

6)

**Delete Row**Deletes a row of the matrix (and therefore Restrictions Vector).

7)

**Execute**Executes simplex algorithm and obtains the final solution.

8)

**Step-By Step Execute**Executes simplex or two phase method allowing look each step and phase of the simplex algorithm.

Click here to access Simplex On Line Calculator

Or Click here to overview Simplex Calculator for Android devices

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### Post from other users

### cassamo:

2012-12-06 08:14:27
crude refinery uses three (1,2 and 3) to produce four products (gasoline, kerosene, diesel and residual) Cost of raw materials and selling prices of the products are shown in the diagram.:

crude1($110/bbl) gasolina($360/bbl)

crude2($75/bbl) black box querosene($240/bbl)

crude3($90/bbl) gasoleo($210/bbl)

residuo($100/bbl)

The following table shows the expected performance of each of the crude oil processed in terms of the desired products.

a) Formulate the problem

b) terminate the simplex method and determine the optimal production plan for the refinery

crude1($110/bbl) gasolina($360/bbl)

crude2($75/bbl) black box querosene($240/bbl)

crude3($90/bbl) gasoleo($210/bbl)

residuo($100/bbl)

The following table shows the expected performance of each of the crude oil processed in terms of the desired products.

Product | Yield by % of volume | Desired maximum production bbl/day | ||

Crude1 | Crude2 | Crude3 | ||

Gasoline | 80 | 60 | 44 | 24000 |

Kerosene | 5 | 15 | 10 | 2000 |

Diesel | 10 | 20 | 36 | 6000 |

Residue | 5 | 5 | 10 | |

Costs of processing ($/bbl) | 5 | 5 | 10 |

a) Formulate the problem

b) terminate the simplex method and determine the optimal production plan for the refinery

Post here