Alchemex

Good spreadsheets are essential for informing decision making. But most spreadsheets are not good. We help you make better spreadsheets.

This early spreadsheet, a Babylonian clay tablet c.1800 BC, contains several errors. How many errors do your spreadsheets have?

Incorrect use of Excel's NPV function is a common source of spreadsheet errors. We show several pitfalls and ways to avoid them.

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

"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.

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.

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