Huai Liu

"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.

Incorrect use of Excel's NPV function is a common source of spreadsheet errors. We show several pitfalls and ways to avoid them.

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

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

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

Once information is loaded into a spreadsheet, it acquires properties that it may not deserve – a process called reification.

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

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