Projects and phases

In Twproject a “project” is the top-level  (the root of the tree) and simply “phases” the others.

The simplest project in Twproject is defined just by its name. Of course, if you want the project to be useful, you have to specify a starting date, duration, and, at least , a resource that will work/manage/supervise it – in project management terms, a resource assigned to the project.
So name, timing and assignments are the main properties of a Twproject project.