Digital Pig

95% of all spreadsheets contain errors. So, it is almost certain that your spreadsheets are wrong.

"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.

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

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

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

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

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

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