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FICO's avatar
FICO
Community Manager
5 years ago

mpvar variables and identifiers

Hi, Is it possible to sum a mpvar and an integer variable into an index of another mpvar ? Example: declarations x: array(1..10,1..5) of mpvar y: mpvar end-declarations y is_integer y <= 2 fo...
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FICO's avatar
FICO
Community Manager
5 years ago

Thank you.

I'll try to provide more detailed info.

For instance, consider 2 decision variables. Start(i,j) is 1 if task i starts at j and Finish(i,j) is 1 if task i finish the job at j.

If the time between start and finish is known, I can perform the following constraint:

declarations
Start: array(1..nTask, 1..nTime) of mpvar
Finish: array(1..nTask, 1..nTime) of mpvar
time: array(1..nTask) of integer
end-declarations
 
forall(i in 1..nTask, j in 1..nTime)Start(i,j) = Finish(i,j+time(i))

But now, if several options of time are available, for instance between 1 and 4, I want also to optimize the best choices of it.

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