Software reliability and cost models: Perspectives, comparison, and practice

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Computer software has gradually become an indispensable element in many aspects of our daily life and an important factor in numerous critical applications such as nuclear plants, medical monitoring control, real-time military and air traffic control. In this paper, we present recent studies in software reliability engineering that include nonhomogeneous Poisson process (NHPP) software reliability models, NHPP models with environmental factors, and cost models. Several applications are presented to illustrate the models. More applications are needed to fully validate the descriptive and predictive software reliability models in a general industrial setting. Future research directions in software reliability are also discussed.

Original languageEnglish (US)
Pages (from-to)475-489
Number of pages15
JournalEuropean Journal of Operational Research
Issue number3
StatePublished - Sep 16 2003

All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Modeling and Simulation
  • Management Science and Operations Research
  • Information Systems and Management


  • Cost model
  • Nonhomogeneous Poisson process
  • Quasi-renewal process
  • Reliability optimization
  • Software reliability
  • Software testing


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