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xp vs cmm[תÌû] Paper for XP Universe, Raleigh, NC, 23-25 July 2001 1 Extreme Programming from a CMM Perspective Mark C. Paulk Software Engineering Institute Carnegie Mellon University Pittsburgh, PA 15213 USA +1 412 268-5794 mcp@sei.cmu.edu ABSTRACT Extreme Programming (XP) has been advocated recently as an appropriate programming method for the high-speed, volatile world of Internet and Web software development. This popular methodology is reviewed from the perspective of the Capability Maturity Model¨° (CMM¨° ) for Software, a five-level model that prescribes process improvement priorities for software organizations. Overviews of both XP and CMM are provided, and XP is critiqued from a Software CMM perspective. The conclusion is that lightweight methodologies such as XP advocate many good engineering practices, although some practices may be controversial and counter-productive outside a narrow domain. For those interested in process improvement, the ideas in XP should be carefully considered for adoption where appropriate in an organization's business environment since XP can be used to address many of the CMM Level 2 and 3 practices. In turn, organizations using XP should carefully consider the management and infrastructure issues described in the CMM. Keywords Software CMM, Capability Maturity Model, CMM, Extreme Programming, XP, agile methodologies, lightweight processes 1 INTRODUCTION In recent years, Extreme Programming (XP) has been advocated as an appropriate programming method for the high-speed, volatile world of Internet and Web software development. XP can be characterized as a "lightweight" or "agile" methodology. Although XP is a disciplined process, some have used it in arguments against rigorous models for software process improvement, such as the Capability Maturity Model for Software, a five-level model that prescribes process improvement priorities for software organizations developed by the Software Engineering Institute (SEI). Many organizations moving into e- ¨° Capability Maturity Model and CMM are registered with the U.S. Patent and Trademark Office. The Software Engineering Institute is a federally funded research and development center sponsored by the U.S. Department of Defense. Commerce have existing CMM-based initiatives (and possibly customers demanding mature processes) and desire an understanding of whether and how XP can address CMM practices adequately. This paper summarizes both XP and CMM and critiques XP from a CMM perspective. Although XP can be characterized as a lightweight methodology that does not emphasize process definition or measurement to the degree that models such as the CMM do, a broad range of processes can be considered valid under the CMM. The conclusion is that agile methodologies such as XP advocate many good engineering practices, although some practices may be controversial and counter-productive outside a narrow domain, and that when thoughtfully implemented in an appropriate environment, XP addresses many CMM Level 2 and 3 practices. For those interested in process improvement, the ideas in XP should be carefully considered for adoption where appropriate in an organization's business environment, just as organizations considering XP should carefully consider the management and infrastructure issues described in the CMM. 2 THE SOFTWARE CMM The Capability Maturity Model for Software [5, 6] is a model for building organizational capability that has been widely adopted in the software community and beyond. The Software CMM is a five-level model that describes good engineering and management practices and prescribes improvement priorities for software organizations. The five maturity levels are summarized in Figure 1. The Software CMM is intended to be: ¡ì a common-sense application of process management and quality improvement concepts to software development and maintenance -- the CMM practices are not rocket science (even the statistical process control concepts at Levels 4 and 5 have been successfully applied in other industries for decades) ¡ì a community-developed guide -- input from hundreds of software professionals was solicited in developing the current release of the CMM    Êղؠ  ·ÖÏí   ¶¥(0)

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