Rudyard Kipling wrote an often quoted poem called the six honest serving men, which contains the lines:
“I keep six honest serving-men (They taught me all I knew);
Their names are What and Why and When And How and Where and Who.”
These six topics, which are each questions to be asked, are invaluable ways to view anything you try to deliver. I believe the most critical and under emphasised are the first two, what and why. Its is very easy to jump to when, how and who are going to work on something and miss the entire point of a delivery.