ISBN : 978-81-963532-2-3 (E-Book) 35 STAFFINGLEVELESTIMATION Once the effort required to develop a software has been determined, it is necessary to determinethe staffing requirement for the project. Putnam first studied the problem of what should be aproper staffing pattern for software projects. He extended the work of Norden who had earlierinvestigated the staffing pattern of research and development (R&D) type of projects. In order toappreciate the staffing pattern of software projects, Norden’s and Putnam’s results must beunderstood. Norden’sWork Norden studied the staffing patterns of several R & D projects. He found that the staffing patterncanbeapproximatedbytheRayleighdistributioncurve(asshowninfig.35.1).Nordenrepresente dtheRayleighcurvebythefollowing equation: -t²/2t² E=K/t² * t *e d d WhereEistheeffortrequiredattimet.Eisanindicationofthenumberofengineers(orthe staffinglevel)atanyparticulartimeduringthedurationoftheproject,Kistheareaunderthecurve,andtisth etimeatwhichthecurveattainsitsmaximumvalue.Itmustberemembered d 171 Software Engineering Keerthana P, Manasa KN, Ganga D Bengal
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