For it to be successful, the architect must * remember that the builder has the inventive and creative responsibility for the implementation; so the architect suggests, not dictates; * always be prepared to suggest a way of implementing anything he specifies, and be prepared to accept any other way that meets the objectives as well; * deal quietly and privately in such suggestions; * be ready to forego credit for suggested improvements. Normally the builder will counter by suggesting changes to the architecture. Often he is right--some minor feature may have unexpectedly large costs when the implementation is worked out.