Hi Hans, There is a few books on this. Maybe the most common is "Object- Oriented Software Metrics" by Mark Lorez and Jeff Kidd There is also the one of Michele and Radu "Object-Oriented Metrics in Practice" http://www.springer.com/computer/programming/book/978-3-540-24429-5 About a web site, I do not know. Cheers, Alexandre On 26 Sep 2008, at 06:58, Hans N Beck wrote: -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.