Angus Dunn

Essential reading

Errors in the data, formulas, or manipulation of spreadsheets could be costly, even devastating.
Our spreadsheet methodology has criteria for designing, building, and validating spreadsheets to ensure that they work correctly.
Spreadsheets have errors like dogs have fleas. Nine out of every ten spreadsheets suffer some error, and consequences can be severe.
95% of all spreadsheets contain errors. So, it is almost certain that your spreadsheets are wrong.
"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.
A poorly documented spreadsheet erodes effective use. Our workshops help students develop good documentation habits and skills.
Once information is loaded into a spreadsheet, it acquires properties that it may not deserve – a process called reification.
Every study that has looked for errors has found them in considerable numbers. Spreadsheeting's childhood is over.