David Christensen

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.

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

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

We are conscious of very few of our errors. When people are confronted with their actual error rates, they are typically shocked.

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

Once information is loaded into a spreadsheet, it acquires properties that it may not deserve – a process called reification.

Spreadsheet audit and review procedures are an essential part of almost all City of London financial transactions.