Antonio Sola Rosique

Criticality Analysis for Maintenance Purposes: A Study for Complex In-service Engineering Assets

The purpose of this paper is to establish a basis for a criticality analysis, considered here as a prerequisite, a first required step to review the current maintenance programs, of complex in-service engineering assets. Review is understood as a reality check, a testing of whether the current maintenance activities are well aligned to actual business objectives and needs. This paper describes an efficient and rational working process and a model resulting in a hierarchy of assets, based on risk analysis and cost–benefit principles, which will be ranked according to their importance for the business to meet specific goals. Starting from a multicriteria analysis, the proposed model converts relevant criteria impacting equipment criticality into a single score presenting the criticality level. Although detailed implementation of techniques like Root Cause Failure Analysis and Reliability Centered Maintenance will be recommended for further optimization of the maintenance activities, the reasons why criticality analysis deserves the attention of engineers and maintenance and reliability managers are precisely explained here. A case study is presented to help the reader understand the process and to operationalize the model. Copyright

Criticality Analysis for Maintenance Purposes

The purpose of this paper is to establish a basis for a criticality analysis, considered here as a prerequisite, a first required step to review the current maintenance programs, of complex in-service engineering assets. Review is understood as a reality check, a testing of whether the current maintenance activities are well aligned to actual business objectives and needs. This paper describes an efficient and rational working process and a model resulting in a hierarchy of assets, based on risk analysis and cost–benefit principles, which will be ranked according to their importance for the business to meet specific goals. Starting from a multi-criteria analysis, the proposed model converts relevant criteria impacting equipment criticality into a single score presenting the criticality level. Although detailed implementation of techniques like root cause failure analysis (RCFA) and reliability centered maintenance (RCM) will be recommended for further optimization of the maintenance activities, the reasons why criticality analysis deserves the attention of the engineers, maintenance and reliability managers are here precisely explained. A case study is presented to help the reader to understand the process and to operationalize the model.

Online Reliability and Risk to Schedule the Preventive Maintenance in Network Utilities

This paper presents a methodology and a case study where the proportional hazard model is used to determine reliability and risk of existing repairable systems in a distribution network utility. After introducing different issues relating to conditioning maintenance management in these companies, we discuss the modeling possibilities to obtain online values for systems reliability and risk. In this case we try to model reliability considering current operating time of the equipment, the number of maintenance interventions, and the value of specific monitored parameters. Reliability is then used to calculate equipment risk for a given failure mode during a certain period, and in order to do so, failure mode affection to the network is estimated from historical data. Finally, the paper presents a possible business process to schedule preventive maintenance activities according to previous findings and a case study.

On the Family of Standards UNE-ISO 55000 and How to Effectively Manage Assets

The publication of the ISO 55000 family of standards on asset management is surely a very important event for many economic activity sectors, especially for those that are very intensive in capital investments devoted to physical assets. Although the standards set a framework for the requirements to fulfill in order to manage assets properly, companies, and organizations in general, need to know how to reach those requirements. What are the necessary steps to follow and the supporting structure that needs to be built in order to develop a proper, consistent and competitive assets management process and system? This chapter links ISO 55000 requirements to the assets management framework promoted by the authors, and at the same time, links the models presented in the different chapters of the book, with specific elements of the standards.