Five Paintings IV One of the most extraordinary examples of McCracken's illusory surfaces occurs with Five Paintings IV, 1974. This wall-mounted work has a black polyester resin finish. From some angles the surface is opaque, from others highly reflective, and from still others it seems to reveal great depth. A happy accident in the creation of the work sealed many tiny air bubbles or particulates in the piece. When these catch the light, they suggest a galaxy of stars on a moonless night. John McCracken, Phenomenal: Exhibited Works imperfections
Complete and consistent requirements An architect who needs complete and consistent requirements to begin work, though perhaps a brilliant builder, is not an architect. Mark W. Maier & Eberhardt Rechtin, The Art of Systems Architecting What the problem isThe heart of systems engineeringA late change in requirements is a competitive advantage architecturedesign