Ann Emery

"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.

The cascading structure of typical spreadsheet formulae means that just about every spreadsheet is almost certainly wrong.

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

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

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

Creating a slow spreadsheet is easy. Creating an efficient spreadsheet requires more thought and application of specific techniques.

Spreadsheets can be considered to be the world's most successful end-user programming language. Spreadsheet formulas are Turing complete.

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