Questions tagged [cp-sat]

Questions relating to the Google CP-SAT solver, available through OR-Tools.

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Modelling issue with precedence constraint in OR-Tools

I'm trying to solve an RCPSPDc model It is infeasible, although Ilog Cplex solves it, so I think I have a modelling issue. I have more constraints but the precedence is the one that makes it ...
Diego R. Troncoso's user avatar
4 votes
0 answers

Modelling issue with rcpsp and boolean expressions

I'm trying to solve an RCPSPDc problem in OR-Tools with CP-SAT solver. In my RCPSPDc model (with discount rate) i want to set this objective: $$\max_{s}\sum_{j\in J}\text{profit}_{j}\cdot \frac{1}{(1+...
Diego R. Troncoso's user avatar
3 votes
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Can Pyomo be linked with Google's GLOP or CP-SAT solvers?

Pyomo can be linked with several solvers Open source and commercial ones. I was wondering if Pyomo can be linked with Google's GLOP or CP-SAT solvers?
Optimization team's user avatar
3 votes
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Circuit constraints in ortools

I am looking to assign tasks to people. Each successive task should be started after the first one is finished and should be started at the same location as the preceding task. While the time ...
Srikanth Shastry's user avatar
2 votes
0 answers

Good encoding for grid layout problem

How would you encode the problem given by with an off-the-shelf solver? You need to lay out $n$ ones and $2, 3, ..., m$ on an infinite grid, for $m$ as large as possible. For ...
user1502040's user avatar
2 votes
0 answers

CP sat solver approach for task assignment with pre defined task start end times

I spent some time trying to clarify the problem more succinctly. I has a set of fixed tasks which are of a certain type/category and which can be allocated to a set of workers. The tasks have ...
ana's user avatar
  • 21
1 vote
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Modified bus scheduling problem question in ortools

Has been crossposted in stackoverflow. I want to solve the bus scheduling problem using ortools with some minor modifications. In my case, the max number of drivers is known. The modifications I would ...
azal's user avatar
  • 153
-1 votes
1 answer

[OR-Tools][CP-SAT] Implement an indicator function in a constraint

Good morning ! I would like to implement this constraint using CP-SAT (see image below). x_i,j is a boolean variable, a and b are given. The problem is that I don't know how to implement the ...
Arthursbr's user avatar