difference between methodology and life cycle
Methodology is the organization of the process (as opposed to the final product and the starting task). It could demand many models for the task/product/process or their parts/stages. Of course, it could contain some model(s) that look(s) at the process as a whole. But that bird view is not the methodology, too.
A definition. A Life cycle is the course of developmental changes through which a project passes from its inception as a project request to the mature state as characterized by a stable production environment..A progression through a series of differing stages of development.[3]