What if you did both? Like I did the full page and a half on what the question asked and the issue that our school studied. then right at the end wrote something like "For any company to get sucessful change they should implement kotters theory, the first step is to...etc etc etc". only took like 3 lines.
Is that ok? or will I loose marks?
You will unfortunately lose marks. You get no marks for discussing Kotters as the question didn't ask for it.
But to get a top answer you would have used kotter...
See everything in the study design would have been tested in there! BUT it was up to you to bring it in.. Deff sorts out who knows what they are talking about, who can actually apply the information and not just spit it back out and have no idea what they are talking about...
The question is not about managing change therefore you do not necessarily need to apply Kotters 8 step theory. If you listed all 8 steps in detail gg...i dont know why you would, you wouldnt be responding to what the q was asking at all.
And your thing about "Its up to you to bring it in" is wrong. It's practically impossible to apply everything in BusMan to a broad exam within 2 hours. >.< Especially when they haven't even asked you much specific. I doubt theres that many people who could just go *Bang* "this, this, this and this all relate to this q", write it all down (in the space) and so on and so forth for each q WITHIN THE TIME FRAME.
Look, I don't really know (none of us do, unless one of us wrote the marking scheme

) what the top answers would require, but this is my opinion.
Also VCAA probably knew everyone was thinking Kotter for the 10 marker because its an obvious choice (Just go and have a look at the threads where ppl are claiming '10 free marks') and an easy 8/10 marks as then definitely ppl would just write rote-learnt answers. This is their idea of a trick.