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If the actions involve three different news papers and three different TV channels & we have to select two actions involving at least one news paper and one TV channel, how to specify the constraint for PROMETHEE V ? please guide, as at present the promethee v window shows selection of minimum and maximum no.of actions only?
 
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Author: Bertrand Mareschal
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Let us call the actions respectively P1, P2 and P3, and TV1, TV2 and TV3 to represent the 0-1 decision variables corresponding to the actions (0: not selected, 1: selected).

If you want to select two actions, the constraint is:

P1 + P2 + P3 + TV1 + TV2 + TV3 = 2

In Visual PROMETHEE, you can more simply set the Minimum and Maximum values equal to 2 in the PROMETHEE V window.

At least one newspaper:

P1 + P2 + P3 >= 1

At least one TV channel:

TV1 + TV2 + TV3 >= 1

To enter the constraints, click the Add button. A new line will appear in the bottom table. You can change the name of the constraint (click on the name button) and enter the variable coefficients, the constraint type (<=, =, >=) and the right-hand side.

Then, click on the "Solution" tab (top of the window) to solve the problem and see the solution.

Last update: 11:17 PM Sunday, September 16, 2012

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