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- W2809485364 abstract "Based on expert opinions, informative prior elicitation for the common Weibull lifetime distribution usually presents some difficulties since it requires to elicit a two-dimensional joint prior. We consider here a reliability framework where the available expert information states directly in terms of prior predictive values (lifetimes) and not parameter values, which are less intuitive. The novelty of our procedure is to weigh the expert information by the size m of a virtual sample yielding a similar information, the prior being seen as a reference posterior. Thus, the prior calibration by the Bayesian analyst, who has to moderate the subjective information with respect to the data information, is made simple. A main result is the full tractability of the prior under mild conditions, despite the conjugation issues encountered with the Weibull distribution. Besides, m is a practical focus point for discussion between analysts and experts, and a helpful parameter for leading sensitivity studies and reducing the potential imbalance in posterior selection between Bayesian Weibull models, which can be due to favoring arbitrarily a prior. The calibration of m is discussed and a real example is treated along the paper." @default.
- W2809485364 created "2018-06-29" @default.
- W2809485364 creator A5044190443 @default.
- W2809485364 date "2010-07-27" @default.
- W2809485364 modified "2023-09-27" @default.
- W2809485364 title "Calibrating Weibull priors using virtual data in reliability and risk assessment" @default.
- W2809485364 hasPublicationYear "2010" @default.
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