Questions tagged [software]

For questions related to commercial or open-source computer software used for operations research problems.

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16
votes
6answers
4k views

Are programming languages necessary/useful for operations research practitioner?

This semester I will start teaching Programming in Python to Master students in Supply Chain Management. I would like to start the first lesson with "Why learning programming languages will be useful ...
10
votes
1answer
279 views

Simulation in Python

What is the most common package for discrete-event simulation in the OR community? I have found SimPy package.
12
votes
2answers
226 views

How to choose an architecture for an OR web app and how to learn the tech stack associated?

After carefully reading the answers to my previous post I decided to opt for developing and deploying an app as a web service. I watched a talk on optimization apps. It suggests using the following ...
16
votes
6answers
2k views

List of Implementations for common OR problems

For the TSP there famously is the concord solver (http://www.math.uwaterloo.ca/tsp/concorde.html) which is argubly the fastest exact solver for the TSP. There are many other problems that also show ...
11
votes
1answer
124 views

QA techniques for optimization problem coding

I often spend much, much, more time QAing and debugging my code than I do actually writing the optimization problem or shaping my data. Are there any tools or techniques to make it easier? I am asking ...
7
votes
1answer
265 views

Gurobi's “Out of memory” error without exhausting the RAM?

I wrote a branch-and-price algorithm in Python 2.7 which solves several small LP and MIP models by Gurobi 8.1 in each node. The algorithm runs fine at first, it produces both lower bound and upper ...
9
votes
1answer
88 views

Advantages of IBM CPLEX Studio over CPLEX in MATLAB?

This question comes from the perspective of an MSc student new to both OR and programming OR problems in a MIP framework. My research has led me down this path of needing to program an optimization ...
7
votes
1answer
106 views

Java source code for branch and price

Is there any Java source code (or framework) to implement and solve MILP using the branch and price method? AFAIK, jORLib is a framework to implement B&P using Java, but it does not have any ...
10
votes
6answers
154 views

Are there reusable formulations/heuristics shared with the community?

There aren't many examples of reusable functionality shared as a result of research or commercial software development. Has anyone come across any? Here is one I just learned of: https://github.com/...
10
votes
2answers
186 views

OR Software Forums

A list of OR Software forums would be nice. Can someone import the list of OR Software forums from the (now) read-only OR Exchange at https://www.or-exchange.org/questions/9068/or-software-forums ? ...
26
votes
4answers
220 views

How to avoid having your optimization models rusting?

When designing optimization models for external organizations, I have witnessed the following: We design an optimization model for a given problem. We fine-tune it based on a portfolio of ...