Assessment of Semi-Parametric Proportional Intensity Models

This book provides both the assessment of repairable§system reliability using the proportional intensity§models and a thorough evaluation on the model§performance for a set of special engineering§applications, including right-censoring severity,§life cycles with substantial overhaul (dormancy)§intervals, and multiple failure types (major and§minor). Compared to the extensive literature on§application of the Cox-based PI regression models in§the biostatistics field, there has been a small but§growing body of literature reported for reliability§engineering applications. The robustness study§simulates recurrent failure data, and provides a§thorough examination across a relevant range of§sample size, shape parameter, and censoring severity§values. Cox-based proportional intensity models§include PWP-GT, PWP-TT, AG, and WLW models. The§results are beneficial to practitioners in§anticipating the more favorable applications domains§and selecting appropriate PI models. This book provides both the assessment of repairable system reliability using the proportional intensity models and a thorough evaluation on the model performance for a set of special engineering applications, including right-censoring severity, life cycles with substantial overhaul (dormancy) intervals, and multiple failure types (major and minor). Compared to the extensive literature on application of the Cox-based PI regression models in the biostatistics field, there has been a small but growing body of literature reported for reliability engineering applications. The robustness study simulates recurrent failure data, and provides a thorough examination across a relevant range of sample size, shape parameter, and censoring severity values. Cox-based proportional intensity models include PWP-GT, PWP-TT, AG, and WLW models. The results are beneficial to practitioners in anticipating the more favorable applications domains and selecting appropriate PI models.