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of Software Reliability Engineering, McGraw-Hill, 1996). Storey (Safety-Critical Com-
puter Systems, Addison-Wesley, 1996) and Leveson [LEV95] continue to be the most
comprehensive discussions of software safety published to date.
In addition to [SHI86], the poka-yoke technique for mistake-proofing software is
discussed by Shingo (The Shingo Production Management System: Improving Process
Functions, Productivity Press, 1992) and Shimbun (Poka-Yoke: Improving Product Qual-
ity by Preventing Defects, Productivity Press, 1989).
A wide variety of information sources on software quality assurance, software reli-
ability, and related subjects is available on the Internet. An up-to-date list of World
Wide Web references that are relevant to software quality can be found at the SEPA
Web site:
http://www.mhhe.com/engcs/compsci/pressman/resources/sqa.mhtml