The problem description of the challenge is given here.
Does anyone has some references to similar problem. I would like to participate but I don't know where to start.
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This is a maintenance planning problem, here related to the French high-voltage transmission system. By searching for "maintenance planning problem" on the web, you will find a lot of OR literature on the topic.
Now, to start, may we advise you to:
Then, you will be able to iterate, sophisticating your solution approach (or implementing a new, different one).
Note that all the instances given for now (namely, A instances) can be solved to near optimality by LocalSolver through a direct modeling approach. In particular, LocalSolver allows modeling easily and exactly the risk as an external (black-box) function, which is not possible when using traditional MILP solvers. LocalSolver is a commercial product but if you are interested to use it freely for the challenge, you will be welcome.
In a way or another, we encourage you to participate in such a challenge. This is a very formative exercise for real-life OR.