A number of research papers and commercial products are now available to provide asset management plans for water pipeline networks. These include the ABLE system developed by O'Hagan in the UK, which uses a combination of Bayesian methods and sampling to determine projected costs and the KANEW system developed by Deb, Hasit, Grablutz and Herz in the USA, which provides estimates of the length of pipeline that should be replaced each year.
There is also the more detailed modelling technique applied to individual assets by Constantine & Darroch in Australia and developed further more recently by our group. This method models the failure rate of each asset as a function of material, diameter, year laid, soil, pressure and other covariates. Once costs are defined associated with the repair and replacement of assets, the model so produced allows different potential management strategies to be compared. Each of these methods, and others, has particular data requirements, and each offers water utilities a different level of detail in their output. This paper will compare and contrast the different requirements and methodologies available and will consider the value they represent to water utilities. Click here to read more