IWSM 2018 Forums Estimating Software maintenance as a function of application size

This topic contains 1 reply, has 2 voices, and was last updated by  Jacqueline Eshuis 4 years, 2 months ago.

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    Carlos Vazquez


    Is there out there some work about software maintenance as a function of application size measured in Function Points? Something like an average of 33% of the application size is delivered as enhancement projects along the year. If the data is segmented by application age, even better.

    Thanks in advance,


    Jacqueline Eshuis

    Hi Carlos,
    I don’t know whether I understand your questions correctly.
    Software Maintenance for me is removing defects. Enhancements is changed / added requirements.

    Software Maintenance can be based on a certain percentage of new build effort on a yearly basis. Like 15 or 25% of the new build effort. If you have a higher percentage, than you can include some small enhancements (less than 2 weeks time & not involving db changes), but usually the larger enhancements are put into development projects.

    There is no such thing as a certain percentage of the application should have enhancements! This really depends on how the business is changing and can vary per business/customer.

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