Minimize costs? Create a conference schedule with fewest early-morning sessions? In this excerpt from the book Data Smart, find out how to use Excel's free Solver add-in to do some data science ...

Excel can solve for unknown variables, either for a single cell with Goal Seek or multiple cells with Solver.

In April, Walmart executives acknowledged it has an inventory management problem: the company lost $3 billion in 2013 sales due to out of stock merchandise while its inventory grew at a faster ...