I suspect the (good) point that
@yodon is trying to make is: applying an ordinal value to something like a "hierarchy of phases" in the absence of
any context (including which sub-forum the question is posted in) does not allow for a meaningful response.
For example, does "Human Factors and Phase 3" refer to
- An ordered phase in a specific type of development life-cycle?
- A response stage in the control of nuclear reactors during an emergency?
- A clinical trial?