1. On the Tools menu, click Add-Ins.

2. If the add-in (add-in: A supplemental program that adds custom commands or custom features to Microsoft Office.) you want to use is not listed in the Add-Ins available box, click Browse, and then locate the add-in.

3. In the Add-Ins available box, select the check box next to the add-in you want to load, and then click OK.
4. If necessary, follow the instructions in the setup program.

1. In the Max Time box, type the number of seconds that you want to allow for the solution time.
2. In the Iterations box, enter the maximum number of iterations that you want to allow.

Note  If the solution process reaches the maximum time or number of iterations before Solver finds a solution, Solver displays the Show Trial Solution dialog box.

• In the Precision box, type the degree of precision that you want— the smaller the number, the higher the precision.

• In the Tolerance box, type the percentage of error you want to allow in the solution.

• In the Convergence box, type the amount of relative change you want to allow in the last five iterations before Solver stops with a solution— the smaller the number, the less relative change that is allowed.