Yusuf Jafry

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

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

Research concludes unanimously that spreadsheet errors are both common and non-trivial. We must seek ways to reduce spreadsheet errors.

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

Solver Max provides a collection of optimization model examples in Excel (using the Solver and OpenSolver add-ins) and Python.

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

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

Errors in the data, formulas, or manipulation of spreadsheets could be costly, even devastating.