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65 Example Questions (2 closed)

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Where can I find comprehensive problem instance repositories for variants of the vehicle routing problem?
added by alerera Apr 3 '19 at 13:15
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What does the term "ergodic convergence rate" mean in the context of first-order methods?
added by Christian Kroer Mar 31 '19 at 18:36
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up vote 1 down vote
What does the dual problem of a min cut problem represent?
added by Simon Apr 1 '19 at 15:13
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Examples of nonlinear MIP formulations (in objective or constraint) that can be handled well by commercial solver without explicit linearization?
added by abhiieor Apr 3 '19 at 10:50
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MIP or continuous? And did you intend to ask for NLP problems that solves better without linearization tricks? The current question seems to suggest that commercial solvers runs poorly on any type of nonlinear problem and that you are seeking examples where they are not garbage. – Henrik A. Friberg Apr 4 '19 at 7:09
edited per comments. thanks. – abhiieor Apr 4 '19 at 7:54
up vote 1 down vote
What is the methodology for determining the size of a Markov Decision Process state space?
added by user201454 Apr 3 '19 at 14:00
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What are good methods for selecting # and location of breakpoints for an arbitrary function when modeling using a piecewise linear function in a MIP?
added by Nathan Brixius Apr 4 '19 at 20:52
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Why do most constraint solvers only support 2 levels of constraints (hard and soft)?
added by Geoffrey De Smet Apr 1 '19 at 7:06
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Is cut generation linear program implemented in Bonmin?
added by guanglei, edited by Henry WH Hack v3.0 Apr 2 '19 at 22:12
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Is there a non-SDP based algorithm for solving the clique problem in perfect graphs?
added by Sriram Sankaranarayanan Apr 1 '19 at 13:29
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How do you consider integer variables in SDDP?
added by E. Tucker Apr 1 '19 at 13:32
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What algorithms are commonly used today for scenario reduction?
added by E. Tucker Apr 1 '19 at 13:35
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Are there specific strategies to prove that valid inequalities for vehicle routing alike problems are facet defining?
added by Albert Schrotenboer Apr 2 '19 at 0:10
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How can I take fairness between employees into account for a scheduling optimization problem?
added by Michael Apr 2 '19 at 16:56
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How do you find the best length for a tabu list?
added by Michael Apr 2 '19 at 19:14
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When is it better to use orbital branching instead of symmetry-breaking constraints?
added by Thiago Serra Apr 2 '19 at 22:07
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How do I write threadsafe lazy callbacks for CPLEX when interfacing via Julia and JuMP.jl?
added by rcorywright Apr 3 '19 at 4:11
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Where can I find benchmark MILP formulations with data to compare myself different solver packages e.g. CPLEX, GUROBI, Coin-OR?
added by abhiieor Apr 3 '19 at 10:42
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Could be more specific. “Easiest way to determine the best solver for my optimization problems?” or “Where can I find [insert problem type, e.g., portfolio optimization] instances that are suitable for benchmarking solvers”. – Henrik A. Friberg Apr 4 '19 at 20:40
I beg to differ here because I tried to frame this question for someone evaluating solver to buy. In such case you will have set of problems like some LPs, some MILP and may be some MINLP etc. to check. In such case this data/problem dictionary will help. I haven't done such analysis exhaustively but I cannot deny hardware aspect here, which can make solution time differing from what is reported on comparison benchmark. For data science google now natively support finding dataset but for OR it take more effort to search such cases. – abhiieor Apr 5 '19 at 8:30
Though updated sample with benchmark in my question to make it more specific. – abhiieor Apr 5 '19 at 8:31
We agree that the question is for "someone evaluating which solver to buy".. But typically you have an idea of what type of problems you are interested in, and this is important since the solvers may perform poorly on some problem type and be superior on another. So I still recommend that you are more specific to get a proper answer. – Henrik A. Friberg Apr 5 '19 at 9:11
Perhaps split you question into two: One where you are looking for benchmark problems of some kind, and another where you are looking for easy ways to compare multiple solvers on some problem collection. – Henrik A. Friberg Apr 5 '19 at 9:13
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What is the cost of latency in high-frequency trading?
added by Niteesh Shanbog Apr 3 '19 at 11:11
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Do I need to fulfil the assumption of constant demand of EOQ?
added by Niteesh Shanbog Apr 3 '19 at 11:14
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Why does my deterministic code give different outputs for the same inputs?
added by Niteesh Shanbog Apr 3 '19 at 11:29
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What are the phases of operations research?
added by Niteesh Shanbog Apr 5 '19 at 7:30
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Which public VRP dataset are recommended to benchmark my algorithms on?
added by Geoffrey De Smet Apr 5 '19 at 7:42
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up vote -3 down vote
What's the best Operations Research forum option? Which criteria to use & how to combine them? How to handle uncertainty and differing points of view? [closed]
added by Mark L. Stone Mar 31 '19 at 21:22
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closed as not a real question by Henry WH Hack v3.0, Nij, Simon, rocarvaj, LarrySnyder610 Apr 1 '19 at 19:24

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form.
up vote -3 down vote
Why is Patrick Rivett's "The Craft of Decision Modelling" out of print?
added by Sean MacDermant Apr 1 '19 at 16:46
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up vote -4 down vote
Anyone know a good Java library for agent-based simulations? [closed]
added by prubin Mar 31 '19 at 18:30
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closed as not constructive by Nij, Simon, Henry WH Hack v3.0, Mark, double-beep Apr 3 '19 at 17:52

This question is not a good fit to our Q&A format. We expect answers to generally involve facts, references, or specific expertise; this question will likely solicit opinion, debate, arguments, polling, or extended discussion.

Downvoting this question because guidelines say we should "Avoid asking questions that are subjective, argumentative, or require extended discussion. Stack Exchange does not work well with questions like 'Which is the best…'". area51.stackexchange.com/faq. Maybe reword to something like "Which Java libraries implement tools for agent-based simulation?" – LarrySnyder610 Apr 2 '19 at 2:40
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I'm familiar with the SE guidelines, but I would hate to discourage users by being overly enthusiastic about supporting them. – prubin Apr 2 '19 at 15:07
Fair enough. :) – LarrySnyder610 Apr 2 '19 at 18:31
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