Group Maintenance Scheduling: A Case Study for a Pipeline Network
This paper presents a group maintenance scheduling case study for a water distribution network. This water pipeline network presents the challenge of maintaining aging pipelines with the associated increases in annual maintenance costs. The case study focuses on developing an effective pipeline replacement planning for the water utility. Replacement planning involves large capital commitment and can be difficult as it needs to balance various replacement needs under limited budgets. A Maintenance Grouping Optimization (MGO) model based on a modified genetic algorithm was utilized to develop an optimum group maintenance schedule over a 20 year cycle. An adjacent geographical distribution of pipelines was used as a grouping criterion to control the searching space of the MGO model through a Judgment Matrix. Based on the optimum group maintenance schedule, the total cost was effectively reduced compared with the schedules without grouping maintenance jobs. This optimum result can be used as a guidance to optimize the current maintenance plan for the water utility.
KeywordsFailure Probability Planning Horizon Life Cycle Cost Water Distribution Network Repair Cost
We wish to thank Mr. Rex Mcbride and Mr. Bjorn Bluhe for providing useful comments and access to the data used in this research. This research was conducted within the CRC for Infrastructure and Engineering Asset Management, established and supported under the Australian Government’s Cooperative Research Centres Program.
- 1.Li F et al. (2011) A grouping model for distributed pipeline assets maintenance decision. Proceedings of 2011 international conference on quality, reliability, risk, maintenance, and safety engineering. Xian, pp 627–632Google Scholar
- 2.Deb AK et al. (1998) Quantifying future rehabilitation and replacement needs of water mains. AWWA Research Foundation. p 156Google Scholar
- 3.Engelhardt MO (1998) Development of a strategy for the optimum replacement of water mains. Ph.D. Thesis. University of Adelaide: Department of Civil and Environmental Engineering, Adelaide. p 514Google Scholar
- 4.Saegrov S (2005) CARE-W: computer aided rehabilitation for water networks. IWA Publishing, LondonGoogle Scholar
- 5.Moglia M, Burn S, Meddings S (2006) Decision support system for water pipeline renewal prioritisation. ITcon Spec Issue Decis Support Syst Infrastruct Manage 11:237–256Google Scholar
- 7.Kleiner Y, Nafi A, Rajani B (2009) Planning renewal of water mains while considering deterioration, economies of scale and adjacent infrastructure. Water Sci Technol: Water Supply 10(6):89–906Google Scholar