Incorrect use of Excel's NPV function is a common source of spreadsheet errors. We show several pitfalls and ways to avoid them.
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.
We are conscious of very few of our errors. When people are confronted with their actual error rates, they are typically shocked.
Spreadsheet errors are reduced by using good design. Our students do three assignments to acquire good spreadsheet design skills.
Only a quarter of survey participants were satisfied with their spreadsheet testing. Their techniques are largely manual and lack formalism.
Research concludes unanimously that spreadsheet errors are both common and non-trivial. We must seek ways to reduce spreadsheet errors.
95% of all spreadsheets contain errors. So, it is almost certain that your spreadsheets are wrong.
We can help you make better spreadsheets:
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