Errors in the data, formulas, or manipulation of spreadsheets could be costly, even devastating.
We are conscious of very few of our errors. When people are confronted with their actual error rates, they are typically shocked.
95% of all spreadsheets contain errors. So, it is almost certain that your spreadsheets are wrong.
Every study that has looked for errors has found them in considerable numbers. Spreadsheeting's childhood is over.
See our bibliography of spreadsheet best practice, risk management, errors and testing, and methods for improving spreadsheets.
Overconfidence is one of the main causes of spreadsheet errors. Being informed about overconfidence leads to more accurate spreadsheets.
Spreadsheets have errors like dogs have fleas. Nine out of every ten spreadsheets suffer some error, and consequences can be severe.
This early spreadsheet, a Babylonian clay tablet c.1800 BC, contains several errors. How many errors do your spreadsheets have?
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