Gareth Lee

Incorrect use of Excel's NPV function is a common source of spreadsheet errors. We show several pitfalls and ways to avoid them.

The cascading structure of typical spreadsheet formulae means that just about every spreadsheet is almost certainly wrong.

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

60% of large companies feel 'Spreadsheet Hell' describes their reliance on spreadsheets either completely or fairly well.

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

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

"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.

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