Questions tagged [computational-experiments]

For questions on experimentation in computational OR, for example, the performing, analysing and reporting of experiments.

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Literature for building solver portfolios

A portfolio of solvers is a collection of solvers with different configurations that share CPU time, CPU cores, and memory resources and try to get an answer as soon as possible. Solvers might also ...
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2 votes
1 answer
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confusing results of two models with different complexity

i have two models that address the same problem. the first one is : the second one is: for different instances for the same size (n=30) i found the following results ( the first column on the left ...
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7 votes
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How to simulate computational execution time?

I am working with some computational experiments with an Integer Programming (IP) formulation over a well-known set of instances from the literature of my problem. And I would like to compare my ...
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12 votes
1 answer
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Job Shop Scheduling: what objectives are harder?

It is well known that job shop scheduling problems are notoriously hard from a computational point of view. Many papers exist for the makespan objective, and some report on min sum objectives (like ...
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13 votes
2 answers
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How fair is limit solver threads when publishing?

Reading gurobi reference manual I found this: We have also found that certain classes of MIP models benefit from reducing the thread count, often all the way down to one thread. Starting multiple ...
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  • 513
22 votes
3 answers
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How to (graphically) present computational results?

I am interested in evaluating and demonstrating various aspects of the performance of general solvers for mathematical optimization problems (in particular MILPs). I assume that I have a good testset ...
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