April 2006
Intermediate to advanced
608 pages
15h 15m
English
Content preview from Code Quality
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2 Reliability
Investment in reliability will increase until it exceeds the probable cost of errors, or until someone insists on getting some useful work done.
— Gilb’s Fourth Law of Unreliability
A system’s reliability has many facets: maturity (absence of software faults that lead to failures), fault tolerance (or robustness —performance to specification despite some faults), and recoverability (operation after a failure). In this chapter, we first examine the software’s maturity attributes, based on a standard classification of software errors. Thus, in Sections 2.1–2.7, we examine input, output, logic, computation, concurrency, interface, and data-handling problems. The quality of a system’s gui and its usability are also sometimes considered ...
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