Reliability importance assessment using cost-based credible improvement potential

In many manufacturing application the system reliability performance is a key issue in order to obtain the best performance of the equipment. The paper focuses on the reliability enhancement of complex systems containing redundant architecture using the Reliability Importance (RI) methods in order to evaluate the weight of each element on the whole system reliability. The first part of the paper is focused on traditional RI index, such as the Improvement Potential (IP) and the Credible Improvement Potential (CIP). Subsequently a new approach based on a cost-effectiveness analysis (CBCIP) has been introduced and tested on a generic complex system for Oil&Gas application.