113 Redundancy
Using back-up or fail-safe elements to maintain system performance in the event of failure.
• Redundancy is the most reliable method of preventing catastrophic failure.
• When the causes of failure cannot be anticipated, use different kinds of redundancy; for example, having both a hydraulic and a mechanical brake.
• When the causes of failure can be anticipated, use more of the same kinds of redundancy; for example, using independent strands of fiber to weave a rope.
• When performance interruptions are not tolerable, make redundant elements active at all times; for example, using additional columns to support a roof.
• When performance interruptions are tolerable, make redundant elements passive but available; for example, having ...
Get The Pocket Universal Principles of Design now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
