Utility Theory as a Method to Minimise the Risk in Deformation Analysis Decisions
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Abstract
Deformation monitoring usually focuses on the detection of whether the monitored objects satisfy the given properties (e.g. being stable or not), and makes further decisions to minimise the risks, for example, the consequences and costs in case of collapse of artificial objects and/or natural hazards. With this intention, a methodology relying on hypothesis testing and utility theory is reviewed in this paper. The main idea of utility theory is to judge each possible outcome with a utility value. The presented methodology makes it possible to minimise the risk of an individual monitoring project by considering the costs and consequences of overall possible situations within the decision process. It is not the danger that the monitored object may collapse that can be reduced. The risk (based on the utility values multiplied by the danger) can be described more appropriately and therefore more valuable decisions can be made. Especially, the opportunity for the measurement process to minimise the risk is an important key issue. In this paper, application of the methodology to two of the classical cases in hypothesis testing will be discussed in detail: 1) both probability density functions (pdfs) of tested objects under null and alternative hypotheses are known; 2) only the pdf under the null hypothesis is known and the alternative hypothesis is treated as the pure negation of the null hypothesis. Afterwards, a practical example in deformation monitoring is introduced and analysed. Additionally, the way in which the magnitudes of utility values (consequences of a decision) influence the decision will be considered and discussed at the end.
© 2014 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Masthead
- Editorial
- Editorial to the Special Edition of the JAG on Engineering Geodesy
- Research Articles
- A Tale of Five Bridges; the use of GNSS for Monitoring the Deflections of Bridges
- Optimal GPS/accelerometer integration algorithm for monitoring the vertical structural dynamics
- Wavelet De-noising of GNSS Based Bridge Health Monitoring Data
- Utility Theory as a Method to Minimise the Risk in Deformation Analysis Decisions
- Aiming at self-calibration of terrestrial laser scanners using only one single object and one single scan
- Influence of surface reflectivity on reflectorless electronic distance measurement and terrestrial laser scanning
- Experts View
- Engineering Geodesy - Definition and Core Competencies
Articles in the same Issue
- Masthead
- Editorial
- Editorial to the Special Edition of the JAG on Engineering Geodesy
- Research Articles
- A Tale of Five Bridges; the use of GNSS for Monitoring the Deflections of Bridges
- Optimal GPS/accelerometer integration algorithm for monitoring the vertical structural dynamics
- Wavelet De-noising of GNSS Based Bridge Health Monitoring Data
- Utility Theory as a Method to Minimise the Risk in Deformation Analysis Decisions
- Aiming at self-calibration of terrestrial laser scanners using only one single object and one single scan
- Influence of surface reflectivity on reflectorless electronic distance measurement and terrestrial laser scanning
- Experts View
- Engineering Geodesy - Definition and Core Competencies
