Topic
• Latest Post - ‏2013-09-09T17:41:02Z by GGR
Puppy26
17 Posts

# Pinned topic Combining two constraints

‏2013-09-06T20:37:21Z | combining cp cplex problem solver warehouse

Hi all,

I have developed a constraint for opening/closing of depots. The constraint

forall (d in Depots, y in 1..NbYears-1)
Depotstaysclosed:
sum (d in Depots)  Open [d][y]>= sum (d in Depots) Open [d][y+1]; opens the depots in the beginning and close the depots on the last time period(y) and

the other constraint

forall (d in Depots)
Depotstaysclosed:
sum (d in Depots) Open [d]==2; exactly opens two depots during a particular time period.

Could some one help me how to combine these two parameters so that  my ideally solution should be two depots should be opened on all the time period and rest of the depots should be closed on the last time period (y).

Any clue or tips will be highly appreciated. Many thanks!

• GGR
44 Posts

#### Re: Combining two constraints

‏2013-09-09T17:41:02Z

Hi Puppy

Your question is not precise enough. I suggest you mathematically define the different rules you want to apply on your problem. Then it will be possible to write the best possible correct Constraint Programming model.

Hope that helps