@cornz1 - The basics of diabetic control
I'm sorry Mr/s. Cornz, but you could hardly be more wrong on just about everything you've written.
The diabetic herself decides, from day to day, even from hour to hour, how much insulin to inject/pump. This varies around an "ideal" dose, and depends massively on what is eaten, degree of exercise, degree of stress, etc. The amount of variation can easily be as much as 50%, or even more whilst suffering an infectious disease.
The doctor does NOT decide how much insulin should be given, except by giving individual guidelines.
The whole idea of an insulin pump is for a diabetic to be able to adjust the dose of insulin easily and rapidly, and to give boosts just before (or after) meals.
I sincerely hope you never have cause to discover these things for yourself.