So, this goes to my (possibly crackpot) idea that’s been brewing about Diabetic Tetris. Basically, you have a bunch of tools (or insulin shapes) – they’re different boluses or basal settings of different sizes and widths and amplitudes – and you are trying to find the minimal number of them that can keep the BG curve at the top “flat” as much as possible. I’m guessing there are other ways you could do this but that you’ve essentially converged upon this system because overall, it requires the fewest number of operations to keep BG as steady as possible.