Stefan Sauer

Do you document your spreadsheets? We use the FizzBuzz word game to illustrate the importance of documenting your spreadsheets.

Errors in the data, formulas, or manipulation of spreadsheets could be costly, even devastating.

See our bibliography of spreadsheet best practice, risk management, errors and testing, and methods for improving spreadsheets.

Every study that has looked for errors has found them in considerable numbers. Spreadsheeting's childhood is over.

"Oh My God" my formulas are not working! This article covers most of the reasons for Excel formulas not working. And how to fix them.

Solver Max provides a collection of optimization model examples in Excel (using the Solver and OpenSolver add-ins) and Python.

Spreadsheets have errors like dogs have fleas. Nine out of every ten spreadsheets suffer some error, and consequences can be severe.

95% of all spreadsheets contain errors. So, it is almost certain that your spreadsheets are wrong.