Recursion introduction

When an operation need the method in one class to communicate to a method another class, then the interface of these two class (the method) should be named the same. If it happens to be the case where such two methods in the same class, then a logical recursive method is formed, this is defined as recursion introduction by Johnson and Foote.

According to Johnson and Foote, the benefit of recursion introduction is to help programmer to decide what operation should be a method.