: I Chapter 26: Measurement (Domain and web hosting) 26.5 26.6 The
: I Chapter 26: Measurement 26.5 26.6 The Bottom Line on Measurement Measurement programs naturally have some of the best data available to support their efficacy. Metrics guru Capers Jones reports that organizations that have established full software-measurement programs have often improved quality by about 40 percent per year and productivity by about 15 percent per year for 4 to 5 years consecutively (Jones 1991, 1994). He points out that only a handful of U.S. organizations currently have accurate measures of software defect rates and defect removal and that those organizations tend to dominate their industries (Jones 1991). The cost for this level of improvement is typically from 4 to 5 percent of the total software budget. Keys to Success in Using Measurement Here are the keys to success in using Measurement: Set up a measurement group. Put it in charge of identifying useful measurements and helping projects to measure themselves. Track time-accounting data at a fine level of granularity. Start with a small set of measurements. Select what you want to measure by using the Goals, Questions, Metrics approach. Don’t just collect the data. Analyze it and provide feedback about it to the people whose work it describes. Further Reading Software Measurement Guidebook. Document number SEL-94-002. Greenbelt, Md.: Goddard Space Flight Center, NASA, 1994. This is an excellent introductory book that describes the basics of how and why to establish a measurement program. Among other highlights, it includes a chapter of experience-based guidelines, lots of sample data from NASA projects, and an extensive set of sample data-collection forms. You can obtain a single copy for free by writing to Software Engineering Branch, Code 552, Goddard Space Flight Center, Greenbelt, Maryland 20771. Grady, Robert B., and Deborah L. Caswell. Software Metrics: Establishing a Company-Wide Program. Englewood Cliffs, N.J.: Prentice Hall, 1987. Grady and Caswell describe their experiences in establishing a softwaremetrics program at Hewlett-Packard and how to establish one in your organization.
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