Methods for estimating water network rehabilitation needs

Sægrov, Sveinung; König, A.; Mattick, A.; Milina, J.; Røstum, Jon; Selseth, Ingrid

doi:10.2166/ws.2003.0087

Cited by 7 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The modules described are based on key decision-making tasks, such as: risk calculation, failure prediction, costs assessment, data exploration and scenario evaluation. In the same way, a method for estimating water network rehabilitation needs is proposed in [16]. [17] also proposes a DSS for infrastructure maintenance to water supply systems.…”

Section: Introductionmentioning

confidence: 99%

Multi criteria analyses for managing motorway company facilities: The decision support system SINERGIE

Montmain

Sanchez²,

Vinches

2009

Advanced Engineering Informatics

View full text Add to dashboard Cite

Improvements to the decision-making process in the areas of preventive maintenance and facility repairs for a range of infrastructure include maintenance, upgrading and retrofitting operations. Depending on the available information concerning the condition of the facilities, specific types of projects can be pro-grammed. Assigning a priority of action to a given project necessitates an evaluation process that intro-duces several criteria at various functional levels. This multi criteria (MC) evaluation is modelled as the aggregation of partial scores attributed to a project with regards to (w.r.t.) a given set of criteria. The scores are expressed over a finite scale which can cause some troubles when no attention is paid to the aggregation procedure. This paper deals with the consistency of the evaluation process, where scores are expressed as labels by experts (over finite discrete scales), whereas the aggregation model is sup-posed to deal with numerical values and cardinal scales. This is a curious but common apparent paradox in MC evaluation when engineering contexts are concerned. Adequate mathematical tools are provided to tackle the related problems. A robustness analysis of the evaluation process concludes the mathematical part of the paper.The mathematical choices regarding our information processing chain meet the ESCOTA motorway company requirements. Indeed, ESCOTA aims at the formalization and improvement of the decisional process for preventive maintenance of its assets in a MC framework. According to available pieces of knowledge on the infrastructure condition, projects are to be evaluated w.r.t. technical but also to con-formity, security and financial criteria for planning purposes. ESCOTA's engineers are used to manipulate symbolic labels but might convert them into more or less arbitrary numerical values when necessary without the necessary care. The SINERGIE decision support system has been developed for ESCOTA to implement a logically sound information processing methodology. The SINERGIE man-machine inter-faces illustrate the way by which the mathematical concepts described in this paper are used in terms of infrastructure management activities. The various information processing phases laid out in SINERGIE have been illustrated for road applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Multi criteria analyses for managing motorway company facilities: The decision support system SINERGIE

Montmain

Sanchez²,

Vinches

2009

Advanced Engineering Informatics

View full text Add to dashboard Cite

show abstract

“…A significant body of research has focused on the identification of pipes that require rehabilitation; reviews are given in Marlow et al (2013), Marlow et al (2007), and Sægrov et al (2003). Less emphasis has been given to the subsequent decision of which rehabilitation technique to use and, in particular, whether to replace or renovate pipes.…”

mentioning

confidence: 99%

Rehabilitation of Small‐Diameter Cast‐Iron Pipe: US, UK, and Australian Perspectives

et al. 2015

View full text Add to dashboard Cite

Cast‐iron pipe is commonly found in water supply networks across the globe. Because these pipelines are legacy assets, utilities typically conduct annual rehabilitation programs to renovate or replace a portion of these pipes. Although the traditional approach involves open‐cut procedures, various trenchless renovation and replacement techniques can be used, although their use is less common in the United States than in some other English‐speaking countries. Research was thus undertaken to consider the differences in attitudes toward rehabilitation of small‐diameter (4–8 in., or 100–200 mm) cast‐iron pipe in the United States, Australia, and the United Kingdom. Survey and interview‐based techniques were used to generate case studies of existing practices. The results suggest that preferences and assumptions about the relative value of different techniques play a significant role in decision‐making. Though conflicting views were expressed, the researchers concluded that renovation and trenchless replacement techniques should be selected when they provide significant life‐cycle cost savings and are technically feasible.

show abstract

An expert system for assessing the technical and economic risk of pipe rehabilitation options

Marlow

Gould

Lane

2015

Expert Systems with Applications

View full text Add to dashboard Cite

Methods for estimating water network rehabilitation needs

Cited by 7 publications

References 0 publications

Multi criteria analyses for managing motorway company facilities: The decision support system SINERGIE

Multi criteria analyses for managing motorway company facilities: The decision support system SINERGIE

Rehabilitation of Small‐Diameter Cast‐Iron Pipe: US, UK, and Australian Perspectives

An expert system for assessing the technical and economic risk of pipe rehabilitation options

Contact Info

Product

Resources

About