At its core, agile is an iterative project management methodology. Agile works by breaking projects down into short duration milestones of user functionality, prioritizing them, and then continuously delivering iterations, usually, in short two week cycles.
While I’m no longer a formal Project Manager, from time to time I still have the need to create a project Plan or to help someone else to organize a project plan. Usually. I find that it is easier to get to a more holistic plan faster, if I have a pattern of essential tasks and milestone to work with. So, I usually go to a template which I have assembled across time use as an accelerator and/or job aide. The attached project plan templates are for a common data warehouse project pattern, but by no means is intended to be the end all of project plans; it is just a starter kick, sort of speak.
There are several reasons why projects plan patterns may vary, other than the experience and knowledge of project planner, among them are:
The environment migration pattern in use
The application stack of the of the environment
The tools use to manage the project plan (MS Project, JIRA, OpenProj, etc.)
The size and complexity of the project team
Here is project plan mockup around Infosphere Datastage, but should be adaptable to any other ETL application.