Nathan Garrett

Good spreadsheets are essential for informing decision making. But most spreadsheets are not good. We help you make better spreadsheets.

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

Overconfidence is one of the main causes of spreadsheet errors. Being informed about overconfidence leads to more accurate spreadsheets.

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.

See our bibliography of spreadsheet best practice, risk management, errors and testing, and methods for improving spreadsheets.

"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.