“(…) let’s take a closer look at some examples of visions and strategies. For my first example consider you are living in the 15th century and you have a family with 2 kids. As a responsible parent you want to make sure they are fed well. Your children haven’t had a full meal with a nice piece of meat in a while. As soon as you wake up you create your vision: “Today at 20.00 my children will eat a full meal with a fresh piece of meat, larger than they can eat!”. That is pretty concrete, right? There is a time-line, a quantifiable goal, although the type of meat and the quantity is still left open. But you sort of get it, it is concrete enough.” (Martijn van Welie – Thoughts on Interaction Design)