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Function points adjustment and requirements taxonomy

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  • remyfannader
    Function points are supposed to be adjusted using general system characteristics. The problem is that those characteristics lump together different kinds of
    Message 1 of 2 , Aug 5, 2013
      Function points are supposed to be adjusted using general system characteristics. The problem is that those characteristics lump together different kinds of concerns: business (e.g complex processing), functional(e.g end-user efficiency), operational (distributed locations, maintainability), or development effort (e.g reusability).
      Instead, adjustment should be done according requirements taxonomy.
      http://caminao.wordpress.com/about/community/requirements-functionpoints/
      Remy
    • SteveN
      Hello Remy, Actually the GSC have never been required, and since they were rejected by ISO, IFPUG has made it clear they are optional. Whether a count adjusted
      Message 2 of 2 , Aug 10, 2013
        Hello Remy,

        Actually the GSC have never been required, and since they were rejected by ISO, IFPUG has made it clear they are optional. Whether a count adjusted using them is distinguished by AFP or UFP. Actually there is some ambiguity in AFP because there are the General Systems Characteristics (GSC) (an ordinal scale from 0 - 5) and the GSC Guidelines (an interval scale from 0 - 5, with clear descriptions for each possible value). There is no indication which adjustment was used, but the vast majority of AFP (in my experience) use the guidelines and IFPUG CFPS testing has always deferred to the guidelines. And you are right too generally that the GSC (guidelines) are fraught with problems. The GSC themselves are a sound analysis tool applied against a particular data set, but probably should not be a general part of functional sizing, but rather part of the general analysis incorporating the size measures.

        Steve
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