Excel's built-in features cover most jobs, but these five free add-ins make everything from date entry to data analysis easier.

An optimization problem is one where you have to make the best decision (choose the best investments, minimize your company’s costs, find the class schedule with the fewest morning classes, or so on).

Stratified mean-per-unit sampling is a key tool used by auditors. The popularity of this statistical procedure arises from its unique ability to produce trustworthy ...

In the first part of this blog, Using Solver in Excel, Part 1, we started looking at what we can do with the Solver add-in to the Excel spreadsheet program. We looked at using Solver for the design of ...

I'm using Excel's Solver utility to help us calculate a day's roster for one section of our business based on averaged demand for staff. I've got an array of possible shifts and a staff multiplier for ...