Dale, with todays GPS surveying and CAD design this is quite easy.
1) Survey the existing green. Create a 3-D computer model of the existing contours
2) measure all the slopes and current Stempmeter speeds.
3) decide how much "softening" is desired.
4) draw new contours and upload them into the GPS
5) Stake out the new design
6) check the construction every step of the way to insure it conforms to the design
7) compare the as-built to the as-planned prior to seeding.
when you are happy, seed, water and wait.
9) enjoy your new green.
Tim:
I don't agree with your characterization of this as "easy". A confident heart surgeon might tell you that open-heart surgery is easy, too, but they are also obliged to tell you that you might die on the operating table!
It's easy to draw a new green, and it may be easy to build one. It is not at all easy to get the shaping to be indistinguishable from a bunch of older greens; your example assumes that the contours you draw will fit perfectly by eye on the site. Let's just say I have seen a whole bunch of new greens on older courses over the years, which were easy to pick out as having been rebuilt. Of course, this is partly true because not all architects are sympathetic to older work, and are out of their element working on an old course.
And no matter the design, it is VERY hard to get the agronomy of a new green to match up to that of a bunch of old greens. We've struggled with this on several occasions, even with the best advice in the business on the agronomy side, and with excellent greenkeepers in charge of them. You can't really replicate the original construction method of the green, because the last thirty years of sand topdressing have changed the construction; yet a new USGA green doesn't relate well to an old green that's been topdressed for years, either.
I try hard not to rebuild greens if I don't have to. Still, over the past twenty years, I have "softened" at least one green at Mid Ocean Club, Pasatiempo, The Valley Club, Holston Hills, White Bear Yacht Club, San Francisco Golf Club, and most recently at Royal Melbourne (East). If you can tell me which greens we softened, then you win a prize but prove my point at the same time; if you can't tell, then maybe you are right that it can be done successfully. But I will tell you that I still lose sleep over a couple of these; I'd really have preferred not to rebuild them at all, but they weren't even close to being playable at 11 or 12 on the Stimpmeter. And I am holding my breath over the day when Crystal Downs suddenly decides that THEY need to change a couple of greens.
The one I felt the worst about was the 14th green at Holston Hills, a difficult par-3 with a very severe green. It was clear it had to be re-done, but that whole course was so close to the original Donald Ross construction that I felt terrible about tearing anything up.
Imagine my relief, then, when we dug into the low side of the green and found that it had already been raised at least six inches by someone else years before!