ISFORMULA

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

Only a quarter of survey participants were satisfied with their spreadsheet testing. Their techniques are largely manual and lack formalism.

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

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

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

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

Your spreadsheets may be disasters in the making. Strive for spreadsheets that are validated, reliable, and auditable.

"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.