to the approval committee and project sponsor for approval as the project moves
from phase to phase. Once the work produced in one phase is approved, the phase
ends and the next phase begins. As the project progresses from phase to phase, it
moves forward in the same manner as a waterfall. While it is possible to go backward
through the phases (e.g., from design back to analysis), it is quite difficult. (Imagine
yourself as a salmon trying to swim upstream in a waterfall).