Optimizing VVT strategies: A decomposition approach

M. Barad, A. Engel

Research output: Contribution to journalArticlepeer-review

Abstract

Verification, validation and testing (VVT) of large systems is an important but complex process. The decisions involved have to consider on one hand the controllable variables associated with investments in appraisal and prevention activities and on the other hand the outcomes of these decisions that are associated with risk impacts and systems' failures. Typically, quantitative models of such large systems use simulation to generate distributions of possible costs and risk outcomes. Here, by assuming independence of risk impacts, we decompose the decision process into separate decisions for each VVT activity and supercede the simulation technique by simple analytical models. We explore various optimization objectives of VVT strategies such as minimum total expected cost, minimum uncertainty as well as a generalized optimization objective expressing Taguchi's expected loss function and provide explicit solutions. A numerical example based on simplified data of a case study is used to demonstrate the proposed VVT optimization procedure.

Original languageEnglish
Pages (from-to)965-974
Number of pages10
JournalJournal of the Operational Research Society
Volume57
Issue number8
DOIs
StatePublished - 31 Aug 2006

Keywords

  • Break-even analysis
  • Quality control
  • Risk assessment
  • Taguchi's loss function

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