A modelling tool that we think improves on the built-in Solver window.

An algorithm to build and update the model only using information present on the sheet.

A fast QuickSolve mode that makes it much faster to re-solve your model after making changes.

A built-in model visualizer that highlights your model’s decision variables, objective and constraints directly on your spreadsheet.

OpenSolver is free, open source software.Īs well as providing replacement optimization engines, OpenSolver offers:.

No artificial limits on the size of problem you can solve – have as many variables and constraints as your computer memory allows (but be aware that large problems can be slow to solve).

Compatible with your existing Solver models, so there is no need to change your spreadsheets.

OpenSolver offers a range of solvers for use in Excel, including the excellent, Open Source, COIN-OR CBC optimization engine which can quickly solve large Linear and Integer problems.

OpenSolver provides the following features: Recent developments are courtesy of Jack Dunn at MIT. It is developed and maintained by Andrew Mason and students at the Engineering Science department, University of Auckland, NZ. OpenSolver is an Excel VBA add-in that extends Excel’s built-in Solver with more powerful solvers. OpenSolver for Google Sheets see our dedicated OpenSolver for Google Sheets page for more info on the Google Sheets versions of OpenSolver.ĬOIN-OR Cup Winner: We are pleased to announce that OpenSolver is the winner of the 2011 INFORMS COIN-OR Cup sponsored by IBM. OpenSolver is also available for Google Sheets OpenSolver 2.9.4 Beta Release version is now also available for download. The latest stable version, OpenSolver 2.9.3() is available for download this adds support for using Gurobi 9.0 as a solver. Welcome to OpenSolver, the Open Source linear, integer and non-linear optimizer for Microsoft Excel. OpenSolver uses the COIN-OR CBC optimization engine

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