O Dear O Dear,
Isn't this getting confusing! I assume if you are doing an ILS, this is a PRECISION approach ,hence we could be on the QNH or QFE and talking DA or DH,
If we are doing a NON PRECISION approach, ref to an airfield, not runway, we should be thinking in terms of MDA/MDH.
The initial IRT could throw an assymetric ILS at you and a two engine NDB or VOR, the format is not set in stone and we should be teaching students this.
If the decision at DA/DH or MDA/MDH is go-around, then as our collegue suggests we initiate the actions and if we sink a bit it's still a pass.
If the decision at DA/DH or MDA/MDH is "land" we normally set flaps, regain the slope and land, but must always be aware that at ACA some helpfull person may pull onto the RW so be Prepared to consider the GA at ACA as well.
**** happens in real life!