Transcription of Process Models in Software Engineering
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Process Models in Software Engineering
Process Models in Software Engineering Walt Scacchi, Institute for Software Research, University of California, Irvine February 2001. Revised Version, May 2001, October 2001. Final Version to appear in, Marciniak (ed.), Encyclopedia of Software Engineering , 2nd Edition, John Wiley and Sons, Inc, New York, December 2001. Introduction Software systems come and go through a series of passages that account for their inception, initial development, productive operation, upkeep, and retirement from one generation to another. This article categorizes and examines a number of methods for describing or modeling how Software systems are developed. It begins with background and definitions of traditional Software life cycle Models that dominate most textbook discussions and current Software development practices. This is followed by a more comprehensive review of the alternative Models of Software evolution that are of current use as the basis for organizing Software Engineering projects and technologies.
Since the 1960's, many descriptions of the classic software life cycle have appeared (e.g., Hosier 1961, Royce 1970, Boehm 1976, Distaso 1980, Scacchi 1984, Somerville 1999). Royce (1970) originated the formulation of the software life cycle using the now familiar "waterfall" chart, displayed in Figure 1.
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