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The GRG solver is used for solving smooth nonlinear problems. The Simplex solving method has several performance enhancements in Excel 2010 resulting in greatly improved performance for some problem types. The Simplex method is used for solving linear problems. The Excel 2010 Solver has 3 Solving methods used for solving spreadsheet optimization problems. Now it will be easier for people to associate settings with the solving method that they are using. The Options dialog has now been divided into 3 tabs with settings based on Solving Method. Also, a checkbox for making unconstrained variables non-negative (on by default) is bubbled up to the Solver Parameters dialog.Īlso updated is the Solving Options dialog. For example, the solving method (Simplex, GRG Nonlinear, Evolutionary) can now easily be chosen based on the type of model being solved. The most common features are now surfaced at the top level making it easier for both beginning and advanced Excel users to be successful. The Solver Parameters dialog Box has been streamlined to make it easier to define a model. One of the changes that we have made is to the interface used for setting the Solver Parameters.
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In this post I am going to cover the new user interface for the Solver app, the new solving methods and constraints that can be used, and the new reports that can be generated. I hope to write more posts in the future about examples of using Solver to solve optimization problems. To see an example of (the Excel 2007) Solver in use, check out this earlier blog post where Solver is used to maximize the number of hikes on a vacation road trip.
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You can use Solver, for example, to determine the most efficient shipping routes, maximize income/sales/etc., or discover the best product mix. It works by changing a group of cells related to the target cell to find an optimal value subject to the constraints that you set. Solver helps to find an optimal value in one cell, called the target cell, on your worksheet. It is an add-in licensed from Frontline Systems that has shipped with Excel for many years. In short, Solver is a what-if analysis tool for optimization. The help topic applies to the Solver that ships in Excel 2007 and earlier, but the concepts are very much the same. If you are not familiar with Solver, you can learn more about Solver from Office Online. The purpose of this post is to review the improvements to Solver, and so assumes some familiarity with the tool. In Excel 2010, we have made a number of improvements to Solver that make it easy for beginners to get started and more advanced ones to find solutions to all types of problems. Thanks to Eric Patterson for putting together this post.