The Art of Systems Architecting A Book by Mark W. Maier & Eberhardt Rechtin www.amazon.com Complete and consistent requirements systems
Pointing "Originally I marked these places, quite literally. I laid a small concrete block flush to the ground at the place where I was standing and stretched a stainless steel piano wire out toward the horizon. It might go off a mile; it simply pointed in a direction. And that was the piece." Lawrence Wechler & Robert Irwin, Seeing Is Forgetting the Name of the Thing One Sees Pointing at things place