Agile projects are showing greater promise in rapid fielding as compared to waterfall projects. However, there is a lack of clarity regarding what really constitutes and contributes to success. We interviewed project teams with incremental development lifecycles, from five government and commercial organizations, to gain a better understanding of success and failure factors for rapid fielding on their projects. A key area we explored involves how Agile projects deal with the pressure to rapidly

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... deliver high-value capability, while maintaining project speed (delivering functionality to the users quickly) and product stability (providing reliable and flexible product architecture). For example, due to schedule pressure we often see a pattern of high initial velocity for weeks or months, followed by a slowing of velocity due to stability issues. Business stakeholders find this to be disruptive as the rate of capability delivery slows while the team addresses stability problems. We found that experienced practitioners, when faced with these challenges, do not apply Agile practices alone. Instead they combine practices-Agile, architecture, or other-in creative ways to respond quickly to unanticipated stability problems. In this paper, we summarize the practices practitioners we interviewed from Agile projects found most valuable and provide an overarching scenario that provides insight into how and why these practices emerge. Index Terms-agile software development, architecture, speed, stability, rapid fielding, software development practices Report Documentation Page Form Approved OMB No. 0704-0188 Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. 15. SUBJECT TERMS 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT Same as Report (SAR) 18. NUMBER OF PAGES 10 19a. NAME OF RESPONSIBLE PERSON a. REPORT unclassified b. ABSTRACT unclassified c. THIS PAGE unclassified Standard Form 298 (Rev. 8-98)