Papers in operations research journals on mathematical theory often contain supporting numerical results from computational studies.

The status quo impeded researchers needing to reproduce computational results, make fair comparisons, and extend the state of the art.

A group at IBM Research proposed open source as an analogous yet viable means to publish software, models, and data.

COIN-OR was conceived as an initiative to promote open source in the computational operations research community and to provide the on-line resources and hosting services required to enable others to run their own open-source software projects.

The COIN-OR website was launched as an experiment in 2000, in conjunction with 17th International Symposium on Math Programming in Atlanta, Georgia.

Although it has been a popular choice of open source MIP solver for many years, its performance is now significantly inferior to HiGHS.

SYMPHONY is a callable library which implements both sequential and parallel versions of branch, cut and price to solve MILPs.

It generates the deterministic equivalent linear program, solves it, and provides interfaces to access the scenario solutions.