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Applying Information-Gap Decision Theory to a Design Problem Having Severe Uncertainty
Technical Paper
2006-01-0273
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Often in the early stages of the engineering design process, a decision maker lacks the information needed to represent uncertainty in the input parameters of a performance model. In one particular form of severely deficient information, a nominal estimate is available for an input parameter, but the amount of discrepancy between that estimate and the parameter's true value, as well as the implications of that discrepancy on system performance, are not known. In this paper, the concepts and techniques of information-gap decision theory (IGDT), an established method for making decisions robust to severely deficient information, are examined more closely through application to a design problem with continuous design variables. The uncertain variables in the chosen example problem are parameters of a probability distribution, so the relationship between IGDT and design approaches considering precise and/or imprecise probabilities is explained. Insight gained from a walkthrough of the design example is used to suggest the types of problems an IGDT approach will or will not effectively solve as well as potential limitations that could be encountered when solving more complex problems.
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Citation
Duncan, S., Paredis, C., and Bras, B., "Applying Information-Gap Decision Theory to a Design Problem Having Severe Uncertainty," SAE Technical Paper 2006-01-0273, 2006, https://doi.org/10.4271/2006-01-0273.Also In
Reliability and Robust Design in Automotive Engineering, 2006
Number: SP-2032; Published: 2006-04-03
Number: SP-2032; Published: 2006-04-03
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