Erich Neuwirth

"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.

Spreadsheets can be considered to be the world's most successful end-user programming language. Spreadsheet formulas are Turing complete.

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

Connexion is a collection of the most useful and interesting spreadsheet-related articles from the web.

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.

Spreadsheet errors are reduced by using good design. Our students do three assignments to acquire good spreadsheet design skills.

This article walks you through different methods and built-in tools that can be used to audit and debug Excel spreadsheets.