What's Best! is an add-in to Excel that allows you to build large scale optimisation models in a free form layout within a spreadsheet.

Editions

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What'sBest! 15.0

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What'sBest! 15.0

What'sBest! is an add-in to Excel that allows you to build large scale optimization models in a free form layout within a spreadsheet. What'sBest! combines the proven power of Linear, Nonlinear (convex and nonconvex/Global), Quadratic, Quadratically Constrained, Second Order Cone, Stochastic, and Integer optimization with Microsoft Excel -- the most popular and flexible business modeling environment in use today. What'sBest! 15.0 includes a wide range of performance enhancements and new features.


What's Best! 15.0 Enhancements

 

Faster Solutions on Linear Models with Improved Simplex Solver

Enhancements to the Simplex solvers boost performance on linear models. Large models solve an average of 20% faster using primal simplex and 15% faster for dual simplex.

 
Improved Integer Solver

New symmetry detection capabilities dramatically reduce the time required to prove optimality on certain classes of models with integer variables. Performance has been improved on Markowitz portfolio problems with minimum buy quantities, and/or limit on number of instruments at nonzero level. Other enhancements provide faster solutions on certain task assignment-like models.

 
Global Solver Enhancements

Stability and robustness of the Global solver has been improved through several enhancements to quadratic recognition and range reduction. Improved exploitation of convexity of certain ratio constraints, e.g., as found in heat exchanger network design problems.

 
More Constraint Types Supported

Several new functions and constraint types are recognized, e.g., the =WBALLDIFF() All Different constraint, for general integer variables. The =WBALLDIFF() function allows one to specify a set of integer variables, such that each variable in the set must have a unique value, different from all other variables in the set.


Key Benefits of What's Best!


The World's Most Powerful Solver for Microsoft Excel

  • What'sBest! will efficiently solve your biggest, toughest models. The linear, integer, nonlinear and global solvers in What'sBest! have been designed for large scale commercial use and field tested on real world models by companies around the world. For optimization modeling in Excel, What'sBest! offers unrivaled speed and capacity.


Modeling is Fast and Easy

  • Excel users will find What'sBest! to be an easy and powerful tool for solving optimization problems. Most users are able to begin modeling within minutes of installation.


Build Models for your Clients

  • What'sBest! is an ideal tool for creating optimization applications for use by others. What'sBest! allows you to provide the application in a form that is best suited to the user. For managers, you can build a simple, easy-to-understand spreadsheet. For clerical workers, you can create turn-key applications with custom interfaces.


Extensive Documentation and Help

  • What'sBest! provides all of the tools you will need to get up and running quickly. You get the What'sBest! User Manual (in printed form and available via the online Help) that fully describes the commands and features of the program. Also included in the manual is discussion of the major classes of linear, integer and nonlinear optimization problems along with over two dozen real world based examples that you can modify and expand.

Addons

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Barrier Option

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Barrier Option

The Barrier Option ­provides the ability to deal with quadratic problems.
This option ­ includes a Barrier/Interior Point solver that provides quadratic programming capabilities. This option also provides an alternative method of solving linear models that may be faster than the linear solvers included in the base version.

Global Option

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Global Option

The Global Option provides the global optimisation capability.
Local search solvers are generally designed to search only until they have identified a local optimum. If the model is non-convex, other local optima may exist that yield significantly better solutions. Rather than stopping after the first local optimum is found, the global solver will search until the global optimum is confirmed. The global solver converts the original non-convex, nonlinear problem into several convex, linear subproblems. Then, it uses the branch-and-bound technique to exhaustively search over these subproblems for the global solution. The nonlinear and global license options are required to utilize the global optmization capabilities.

Nonlinear Option

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Nonlinear Option

The Nonlinear Option ­provides the ability for dealing with general nonlinear problems.
This option includes a Generalised Reduced Gradient (GRG) based solver that is capable of finding locally optimal solutions to general nonlinear models.