A software cost model with warranty and risk costs

Hoang Pham, Xuemei Zhang

Research output: Contribution to journalArticlepeer-review

118 Scopus citations


In this paper, a cost model with warranty cost, time to remove each error detected in the software system, and risk cost due to software failure is developed. A software reliability model based on non-homogeneous Poisson process is used. The optimal release policies to minimize the expected total software cost are discussed. A software tool is also developed using Excel and Visual Basic to facilitate the task of determining the optimal software release time. Numerical examples are provided to illustrate the results.

Original languageEnglish (US)
Pages (from-to)71-75
Number of pages5
JournalIEEE Transactions on Computers
Issue number1
StatePublished - 1999

ASJC Scopus subject areas

  • Software
  • Theoretical Computer Science
  • Hardware and Architecture
  • Computational Theory and Mathematics


  • Optimum software release time
  • Risk cost
  • Software cost model
  • Software reliability
  • Software testing
  • Warranty cost


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