The method I usually follow is to place the eggs in cold water, then take the pot off heat once the water starts boiling and let the eggs sit in the water for X minutes. I usually do 4-5 min for soft boiled and 10-12 min for hard boiled.
This is fine when boiling all the eggs either soft or hard but not when I want them to be ready to eat at the same time. Do you know of method that allows both types to be ready at the same time?