The Solver add-in is included by default in Microsoft Excel. You only need to activate it to load it. Learn how to load Solver add-in in Excel if it is not showing.

In the Manage box, select Excel Add-ins and click Go. In the window that pops up, check Solver Add-In and click OK . You'll now see the Solver button in the Analysis group of the Data tab: ...

Now you’re ready to build the model, so bring up the Solver window by pressing the Solver button on the Data tab. Note: The Solver window, shown in Figure 1-23 in Excel 2011, looks pretty ...