For a start,
Why do a broken 200 as opposed to a regular 200? What is the particular advantage of breaking up the distance (or any distance for that matter)?
Is it better to break it up at the 50 or the 100?
What is the ideal rest time between 50's and 100's within a broken 200?
What is the ideal rest time between broken 200's within a set?
What is the ideal number of 200's to do in a set?
Are the accumulated times of a broken 200 an accurate indicator of how fast you can actually go?
If breaking it up at the 50, how much time should be added on for each flip turn?
How many broken 200's should I be able to do at a specific time to be confident that I could repeat that time in a race?
To be a little contrary, I think how well sets predict your times will vary strongly by the type of swimmer you are. I pretty much never approach race times at practice and find that even broken at the 50, I will do a slower time than in a rested meet. I am not sure if it is just that I have trouble summoning the requisite passion in practice or that I taper well or something else, but I find 50s on 1:00 give me a better idea of the kind of pace I will be able to hold in a 200 and 200s broken at the 100 give me faith I can hold on just fine.
To be a little contrary, I think how well sets predict your times will vary strongly by the type of swimmer you are. I pretty much never approach race times at practice and find that even broken at the 50, I will do a slower time than in a rested meet. I am not sure if it is just that I have trouble summoning the requisite passion in practice or that I taper well or something else, but I find 50s on 1:00 give me a better idea of the kind of pace I will be able to hold in a 200 and 200s broken at the 100 give me faith I can hold on just fine.