Level of repair analysis: a generic model

Research output: Working paper

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Given a product design and a repair network, a level of repair analysis (lora) determines for each component in the product (1) whether it should be discarded or repaired upon failure and (2) at which echelon in the repair network to do this. The objective of the lora is to minimize the total (variable and fixed) costs. We propose an ip model that generalizes the existing models, based on cases that we have seen in practice. Analysis of our model reveals that the integrality constraints on a large number of binary variables can be relaxed without yielding a fractional solution. As a result, we are able to solve problem instances of a realistic size in a couple of seconds on average. Furthermore, we suggest some improvements to the lora analysis in the current literature.
Original languageUndefined
Place of Publicationonbekend
PublisherUniversity of Twente, Research School for Operations Management and Logistics (BETA)
Number of pages33
ISBN (Print)9789038612393
Publication statusPublished - 1 Feb 2008

Publication series

NameBeta Working Papers
PublisherBeta Research School for Operations Management and Logistics, University of Twente


  • Level of repair analysis
  • Maintenance
  • IR-70231
  • METIS-247528
  • Integer Programming

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