Zi Zhu

Applying an error taxonomy to examine inexperienced spreadsheet users' planning and execution errors

Essential reading

Only a quarter of survey participants were satisfied with their spreadsheet testing. Their techniques are largely manual and lack formalism.
Once information is loaded into a spreadsheet, it acquires properties that it may not deserve – a process called reification.
Good spreadsheets are essential for informing decision making. But most spreadsheets are not good. We help you make better spreadsheets.
Do you document your spreadsheets? We use the FizzBuzz word game to illustrate the importance of documenting your spreadsheets.
This article walks you through different methods and built-in tools that can be used to audit and debug Excel spreadsheets.
Solver Max provides a collection of optimization model examples in Excel (using the Solver and OpenSolver add-ins) and Python.
Incorrect use of Excel's NPV function is a common source of spreadsheet errors. We show several pitfalls and ways to avoid them.
"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.