March 2015
Intermediate to advanced
816 pages
36h 46m
English
Content preview from Software Engineering, 10th Edition
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10.3 Redundancy and diversity
Component failures in any system are inevitable. People make mistakes, undiscovered bugs in software cause undesirable behavior, and hardware burns out. We use a range of strategies to reduce the number of human failures such as replacing hardware components before the end of their predicted lifetime and checking software using static analysis tools. However, we cannot be sure that these will eliminate component failures. We should therefore design systems so that individual component failures do not lead to overall system failure.
Strategies to achieve and enhance dependability rely on both redundancy and diversity. Redundancy means that spare capacity is included in a system that can be used if part of that ...
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