Block replacement models for cables subject to deterioration

M. Qatan*, B. Alkali, M. Farrag, C. Zhou

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


System reliability has become a major concern for most of the oil and gas industries. Many petroleum companies have underestimated the importance of adapting an effective and sustainable maintenance policy for critical systems that are subject to continuous deterioration leading to system failure. This paper attempts to model the maintenance policy of cables for a petroleum company in the Sultanate of Oman. The cables from which the data is collected have high breakdown costs associated with the current maintenance policies. This paper starts with an exploratory analysis of the cables failure/replacement data and adequate corresponding probability distribution is fitted to the data. A block replacement model is proposed in terms of the renewal function in order to determine the optimal preventive maintenance/replacement policy for the cables. These policies are optimised in order to minimise the cable system and the cables maintenance costs. An example of the costs of the preventive maintenance policy is then compared with the block replacement policy in order to determine the most appropriate policy for the cable replacement. The model proposed in this paper would assist the maintenance asset manager to develop a rational for selecting appropriate replacement option for cable by considering the costs of block replacement against the cost of continuous maintenance as an optimal cost effective maintenance strategy to ensure reliability and availability of cable assets.

Original languageEnglish
Title of host publicationCMD 2016: International Conference on Condition Monitoring and Diagnosis
Number of pages4
ISBN (Electronic)9781509033980
ISBN (Print)9781509033997
Publication statusPublished - 1 Dec 2016
Event2016 International Conference on Condition Monitoring and Diagnosis - Xi'an, China
Duration: 25 Sep 201628 Sep 2016


Conference2016 International Conference on Condition Monitoring and Diagnosis
Abbreviated titleCMD 2016


  • block replacement policy
  • age replacement policy
  • renewal function

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality


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