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An introduction to algorithms and computational complexity to solve combinatorial optimization problems

CSPLib is a library of test problems for constraint solvers.

Instances for the CVRP challenge.

Some books on algorithms are rigorous but incomplete; others cover masses of material but lack rigor. Introduction to Algorithms uniquely combines rigor and comprehensiveness.

This site provides access to a number of Operations Research problem data sets.

A discussion about books focused on duality theory

This book offers an up-to-date description of relaxation/approximation and decomposition techniques, demonstrating how their combined use efficiently solves large-scale optimization problems relevant to engineering, particularly in electrical, and industrial engineering, with a focus on energy.

An interesting book about Column Generation to tackle large-scale optimization problems

Instances for several interesting NP-hard problems.

Instances for Quadratic Assignment Problems.

SNDlib is a library of data for Survivable fixed telecommunication Network Design. Its purpose is to provide data about realistic telecommunication networks (including traffic) available to the research community.

OR-Library is a collection of test data sets for a variety of Operations Research (OR) problems.

TSPLIB is a library of sample instances for the TSP (and related problems) from various sources and of various types.

This web is dedicated to the study of VRP; we have compiled here a great deal of information about it for public access: technical reports, many different variants of the problem, alternative algorithms and techniques for solving it, some well-known instances of the problem, the best-so-far solutions for those instances, bibliography, related links…