Justin Skinner

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

Our spreadsheet methodology has criteria for designing, building, and validating spreadsheets to ensure that they work correctly.

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

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

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

The twenty principles for good spreadsheet practice aims to reduce the amount of time wasted and the number of errors.

"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.

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