In this paper, we discuss the prediction problem based on censored coherent system lifetime data when the system structure is known and the component lifetime follows the proportional reversed hazard model. Different point and interval predictors based on classical and Bayesian approaches are derived. A numerical example is presented to illustrate the prediction methods used in this paper. Mont...

This paper provides an update to [1] on the developments associated with a Prognostics and Health Management (PHM) system design tool that integrates a model-based FMECA methodology with state-of-the-art system simulation directly linked to downstream Life Cycle Costs (LCC). This design tool will seek out recommended PHM system designs based on a cost function that accurately represents key LC...

A new semiparametric proportional hazard rate model is proposed which extends standard models to include a dynamic speci cation. Two main problems are resolved in the course of this paper. First, the partial likelihood approach to estimate the components of a standard proportional hazard model is not available in a dynamic model involving lags of the log integrated baseline hazard. We use a dis...

This paper extends the continuous credibility weighting introduced to hazard estimation in Hardy and Panjer (1998) and Nielsen and Sandqvist (2000) to the more general case, where the common basis is a proportional hazard model.

The software reliability model is the stochastic to measure quantitatively. A Hazard-Rate Model well-known one as typical model. We propose Models Considering Fault Severity Levels (CFSL) for Open Source Software (OSS). purpose of this research make considering CFSL adapt baseline hazard function and 2 kinds faults data in Bug Tracking System (BTS), i.e., we use covariate vectors Cox proportion...

Background & Aims: Renal transplantation is the best therapeutic option for End Stage Renal Disease (ESRD). The aim of this study was to determine the graft survival rate of renal transplantation in patients who have been transplanted from live donor in Shiraz Transplant Research Center, Shiraz, Iran. Methods: In a survival analysis study, organ survival rate after kidney transplantation from...

We discuss the application of the proportional hazard premium calculation principle in the parametric and non parametric framework. In the parametric approach, we propose a method to calculate the premium of a compound risk when the severity distribution is subexponential. In the non parametric approach, the use of the empirical distribution to calculate the premium using the proportional hazar...

This study was performed to examine in detail the use of prescheduled visits of veterinarians on Ontario swine farms. We did this assuming that prescheduled visits would reflect a farm's involvement in preventive health management (PHM). A mail survey, a personal survey, and a prospective study were used to provide descriptors of users and non-users of PHM. Possible relationshiPs between farmer...

I Abstract European cities spend in the order of one billion Euros a year to rehabilitate water supply networks. Rehabilitation costs will increase in the coming decades as networks age and deteriorate. The rational behind today’s rehabilitation decisions is unclear. In the best case, decisions are based on practical experience like failure frequency. During the past 10-20 years, most of the la...

A probability heuristic model (PHM) for syllogistic reasoning is proposed. An informational ordering over quantified statements suggests simple probability based heuristics for syllogistic reasoning. The most important is the "min-heuristic": choose the type of the least informative premise as the type of the conclusion. The rationality of this heuristic is confirmed by an analysis of the proba...