i guess that the problem is that the masterplan would have to be different for every single piece...did you have a piece specifically in mind?
I can't remember where I got it from, but there was an incredibe article on practicing, that outlined around 50 specific practicing techniques (thoroughly) and the types of situations in which they are more or less appropriate.
So with well over 50 specific (there are of course way more too) techniques, and many different learning styles, combined with an individual student who has his own set of strengths and weaknesses...It makes our job seem more like a diagnostatician, than an instructor sometimes...Here is my (very general) approach to literature that is intended to be perfected and performed...
In a pinch, I would say that the initial investment should be spent in analysis, the second should be H.S. perfect practice (sometime with metronome) of these individual themes that were analyzed...(Of course this doesent work for all music...) the third should be H.T. practice of component themes at 25% tempo (Allows one to practice sight effectively while learning)
Finally, the complete song should be pieced together at 25% tempo (to discourage muscle memory as the only memory source). When it is played perfectly, then use many different speeds between 25%-75% to practice at.
some things should be remembered..
1) the key to doing the individual theme practice effectively (In the H.S. and H.T. stage) is to play at least two beats before and after the selected section, to be sure that transitions are not an issue.
2)The key here is to spend more time playing slowly than quickly, I usually advocate 3 slow to one fast...
Remember, this is my "in a pinch" routine, it works for me, and not for everyone. It usually seems initially slower to learn songs like this, but polishing them goes a lot quicker than muscle memory based learning systems. This is my "break in" system for students who come to me with a lot of pieces that are OK but not perfect....
In my opinion, the worst system is the H.T. bar by bar memorizing system, especially when attempted at close to performance tempo. This system gives a sense of initial gratification, but perfecting material learned in this method has proved to be problematic in my experience, especially because fingering problems can be glossed over during the initial stages of this process.
I am always open to learning the other side of the story...If there is a much better (consistently) better approach, then I would be a fool to not want to know about it.