James Fulford

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

Once information is loaded into a spreadsheet, it acquires properties that it may not deserve – a process called reification.

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

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

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

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

The twenty principles for good spreadsheet practice aims to reduce the amount of time wasted and the number of errors.

Only a quarter of survey participants were satisfied with their spreadsheet testing. Their techniques are largely manual and lack formalism.