Success factors in managing legacy system evolution: A case study

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In this paper, we attempt to understand what contributes to a successful process for managing legacy system evolution. We provide an analysis of a number of key performance indicators such as cost, duration, and defects. By normalizing through function points, we furthermore compare to a larger benchmark. To do so we performed a mixed, retrospective case study on a series of nine software releases and eight single once-only releases, all performing on a single, legacy software system, in a West-European telecom company. We interviewed eleven stakeholders that were closely involved in the subject software releases. As a result, we listed a number of observations from the quantitative and qualitative analysis. We found that a release process that performs above average on cost and duration satisfies stakeholders through fast response and direct value, even when the reliability and availability of the actual system is weak.

Original languageEnglish
Title of host publicationProceedings - International Conference on Software and System Process, ICSSP 2016
PublisherAssociation for Computing Machinery (ACM)
Number of pages10
ISBN (Electronic)9781450341882
Publication statusPublished - 14 May 2016
EventInternational Conference on Software and System Process, ICSSP 2016 - Austin, United States
Duration: 14 May 201615 May 2016


ConferenceInternational Conference on Software and System Process, ICSSP 2016
Country/TerritoryUnited States


  • Cost duration matrix
  • Release-based software engineering
  • Scrum
  • Software engineering economics

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