Reza Barkhi

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

A poorly documented spreadsheet erodes effective use. Our workshops help students develop good documentation habits and skills.

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

"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.

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

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

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

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