Depth of Inheritance Tree
Maximum inheritance path from the class to the root class.
The deeper a class is in the hierarchy, the more methods and variables it is likely to inherit, making it more complex. Deep trees as such indicate greater design complexity. Inheritance is a tool to manage complexity, really, not to not increase it. As a positive factor, deep trees promote reuse because of method inheritance.
A recommended DIT is 5 or less.
When a class inherits directly from
Object (or has no