Titus Barik

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

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

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

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

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

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

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

Do you document your spreadsheets? We use the FizzBuzz word game to illustrate the importance of documenting your spreadsheets.