Design usually requires taking into account not only physical and biological constraints, but also economic, political, social, ethical, and aesthetic ones.
Learning Goal 2a
All technologies have effects other than those intended by the design, some of which may have been predictable and some not.
Learning Goal 2b
Side effects of technologies may turn out to be unacceptable to some of the population and therefore lead to conflict between groups.
Learning Goal 3a
Almost all control systems have inputs, outputs, and feedback.
Learning Goal 3bc
The essence of control is comparing information about what is happening to what people want to happen and then making appropriate adjustments. This procedure requires sensing information, processing it, and making changes.
Learning Goal 3d
In almost all modern machines, microprocessors serve as centers of performance control.
Learning Goal 4a
Systems fail because they have faulty or poorly matched parts, are used in ways that exceed what was intended by the design, or were poorly designed to begin with.
Learning Goal 4b
The most common ways to prevent failure are pretesting of parts and procedures, overdesign, and redundancy.