I still do not know if I agree with the way Karrank sees things about STAR restrictions but I LOVE the way he had put it. It's clear and concise.
"Descend to FL180," means "descend to FL180, reach FL180 by PRANG."
-All clear
"Descend to FL140," means "descend to FL140, reach FL180 by PRANG."
-This is the way 90% of people would do. Even if not correct, it's on a "safe" side and ATC won't bug you about it (you only burn few more kilos of fuel). I see CaptPPRuNe doesn't agree on this one
"Descend to FL140, reach FL140 by AUGER," means "descend to FL140, cancel PRANG requirement, reach FL140 by AUGER."
-Agree
"Descend to FL140, additional requirement, reach FL140 by AUGER," means "descend to FL140, reach FL180 by PRANG, and reach FL140 by AUGER."
-Never heard that one. It would be to much from ATC to expect we want to deal two restriction at the same time. There are other things to think during descent (weather, terrain, cabin rate...)
Q to you Karrank:
"Descend to FL180 by PRANG"
"Direct AUGER, descent FL140"
Does that means?
"Direct AUGER, descent FL140, be FL180 abeam PRANG" or
"Direct AUGER, descent FL140, cancel FL180 restriction by PRANG"