Dear Heuristic is the "Rule of Thumb" helps in parametric estimation to let you know how many parameters you need to enter so as to break down your estimation. Saving Changes...
Talking about heuristics means the applicance of general accepted rules or best practises. So, the 80/20 rule in estimation is such an heuristic method. It comes along with experience and common sense. Based on a specific case in your project, you can only practise / test it by yourself and teach yourself about the effectiveness. Saving Changes...
