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Download e-book for kindle: A Guide to selecting software measures and metrics by Capers Jones

By Capers Jones

ISBN-10: 1138033073

ISBN-13: 9781138033078

ISBN-10: 1315314630

ISBN-13: 9781315314631

Going the place no publication on software program dimension and metrics has formerly long past, this critique completely examines a few undesirable size practices, detrimental metrics, and enormous gaps and omissions within the software program literature that overlook very important subject matters in dimension. The booklet covers the main gaps and omissions that have to be stuffed if information approximately software program improvement is to be valuable for comparisons or estimating destiny projects.

Among the more severe gaps are leaks in reporting approximately software program improvement efforts that, if now not corrected, can distort info and make benchmarks nearly dead and probably even destructive. probably the most universal leaks is that of unpaid time beyond regulation. software program is a truly labor-intensive profession, and plenty of practitioners paintings very lengthy hours. notwithstanding, few businesses truly checklist unpaid time beyond regulation. which means software program attempt is underreported via round 15%, that is too huge a price to disregard. different assets of leaks contain the paintings of part-time experts who come and pass as wanted. There are dozens of those experts, and their mixed attempt can best forty five% of overall software program attempt on huge projects.

The booklet is helping software program undertaking managers and builders discover blunders in measurements to allow them to advance significant benchmarks to estimate software program improvement efforts. It examines adaptations in a couple of parts that come with:

  • Programming languages
  • Development methodology
  • Software reuse
  • Functional and nonfunctional requirements
  • Industry type
  • Team measurement and experience

Filled with tables and charts, this publication is a kick off point for making measurements that mirror present software program improvement practices and realities to reach at significant benchmarks to lead winning software program tasks.

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Extra resources for A Guide to selecting software measures and metrics

Sample text

There is a curve called the Putnam–Norden–Rayleigh (PNR) curve that shows the relationships between software effort and schedules. In essence, the curve shows that one person working for 10 months and 10 people working for one month are not equivalent. With 10 people, communications would cause confusion and probably stretch the schedule to two months, hence doubling the effort. One person might not have all of the necessary skills, so the schedule might slip to 12 calendar months. 5 months would probably deliver the optimal result.

Of course this sometimes slows things down, but it is still a common phenomenon as noted years ago by Dr. Fred Brooks in his classic book The Mythical Man-Month (1975). Here too the software literature and software benchmarks are strangely silent. If the average complement of software engineers for 1,000 function points is six people, what would happen if it were increased to 10 people? What would happen if it were reduced to three people? The literature and most benchmarks are silent on this basic issue.

Function testing X X X 100 Function Points 16. Unit testing 10 Function Points X 1 Function Point 15. S. 2, what happens for a small project of 100 function points can be very different from what happens for a large system of 10,000 function points. Note the presence of many kinds of software specialists at the large 10,000 function point size and their absence for the smaller sizes. Note also the increase in activities from 8 to 23 as application size gets larger. Just consider the simple mathematical combinations that have to be estimated or measured as software size increased.

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A Guide to selecting software measures and metrics by Capers Jones


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