Peter:
If you'd like an acronym for "designing up phase" I guess DUP could do.
What I mean by that is a routing is a basic configuration of the holes or sequence of the holes of a course---eg the direction, length, size and basic shape of the holes.
One can have a routing for a golf course on raw land before a single grain of earth is touched.
To me the "designing up phase" is all that follows the routing layout on raw land from the beginning of construction to the completion of the course.
You can imagine how many different construction arrangements could be put on a single set routing with varying bunker placement, size, shape, green configuration, size, orientation etc.
In my opinion, varying design and construction arrangements could make a single set routing look like a score of different courses.