Prioritizing Rubble-Mound Breakwater’s Repairs Using a Multicriteria Approach

AbstractMaritime works deteriorate continuously and at a certain moment in time are in need of some sort of repair. Usually the decision maker seeks technical advice and has to consider the resources available. A literature review showed great limitations in the tools that are today in use. This pap...

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Bibliographic Details
Published in:Journal of performance of constructed facilities 2019-12, Vol.33 (6)
Main Authors: Marujo, Nuno, Trigo-Teixeira, António, do Valle, António Sanches, Araújo, Maria Amélia
Format: Article
Language:English
Subjects:
Armor
Decision analysis
Decision making
Literature reviews
Maintenance
Methodology
Multiple criterion
Rubblemound breakwaters
Technical Papers
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Summary:AbstractMaritime works deteriorate continuously and at a certain moment in time are in need of some sort of repair. Usually the decision maker seeks technical advice and has to consider the resources available. A literature review showed great limitations in the tools that are today in use. This paper presents the implementation of a decision support methodology to prioritize repairs in rubble-mound breakwaters using MACBETH. Models for the benefits of repairing breakwaters, which are based on visual inspection data only, were created, and an expert meeting was held—the decision conference—following MACBETH. As outputs, the criteria, the value functions, and the weights to obtain scores were generated. Yet, using the condition indices set for the different levels of analysis of the breakwater, the decision maker will decide whether and how to intervene. The analysis uses MACBETH for calculating the scores and considers the benefits of the interventions in the armor layer for a breakwater divided into reaches. Costs and benefits are used afterward to prioritize the interventions. The common issue of the limited budget available is solved by applying portfolio—set of interventions—creation methods. The Ericeira rubble-mound breakwater (Portugal), which shows some signs of deterioration, was selected as a case study to illustrate the methodology. Interesting enough, the use of this new methodology shows what are the reaches that must be repaired in the very first place, which was not evident when using conventional analysis. The breakwater head gets the largest benefits in being repaired.
ISSN:0887-3828
1943-5509
DOI:10.1061/(ASCE)CF.1943-5509.0001340