1. Aristocracy, Democracy and System Design

2. Conceptual Integrity Sacrificing some ideas to lead to a common goal Software design tends to lead to conceptual disunity Far better for a system to maintain conceptual integrity

3. Aristocracy & Democracy Conceptual integrity dictates design proceed from one mind, or a small group of minds Schedule pressures demand many workers Must separate architecture and implementation Are the architects an elite group?

4. Idle Implementers? Two common illusions –Architects will get all the creative fun and shut out the inventiveness of the implementers –Many implementers will sit idly waiting on the specifications Work will be done in parallel