OO Design Quality Metrics as specified by Robert C. Martin

Robert Martin has written a paper specifying what could be good OO design quality metrics.

Implementation of JDepend is based on this paper but a visual representation could be higly more usefull to undertand and interpret metrics. Read the end of Robert's paper to understand how true is it or take a look to the attached image :

• Each circle represents a java package
• Circle can have three different colors : green (D is near 0), yellow (D is around 0,2), red (D is around 0,5)
• Size of circle is proportional to its package size

The mean of "Distance" metrics could be a good way to compare projects. Projects with a Distance near than 0 are better than projects with a greater Distance (Could be used as a new metric to colorize the treemap).