Designer, implementor, user, writer A Fragment by Donald Knuth dl.acm.org Thus, I came to the conclusion that the designer of a new system must not only be the implementor and the first large-scale user; the designer should also write the first user manual. The separation of any of these four components would have hurt TeX significantly. If I had not participated fully in all these activities, literally hundreds of improvements would never have been made, because I would never have thought of them or perceived why they were important. Eating your own dog food making
Unfolding In short, the architect is responsible for building construction, is watching the building unfold continuously, and is making ongoing modifications as it becomes clear from each given stage, what modifications and changes should be made at each moment. And this is all to be done within a management framework that controls budget and cost very tightly. Christopher Alexander, The Battle for the Life and Beauty of the Earth In terms which must be altered