Dongmei Zhang

This early spreadsheet, a Babylonian clay tablet c.1800 BC, contains several errors. How many errors do your spreadsheets have?

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

A poorly documented spreadsheet erodes effective use. Our workshops help students develop good documentation habits and skills.

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

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

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

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

We are conscious of very few of our errors. When people are confronted with their actual error rates, they are typically shocked.