International Journal of Strategic Engineering Asset Management (5 papers in press)
A summary of defect evolution and health monitoring of wind turbine blades
by Idriss El-Thalji, Erkki Jantunen
Abstract: The wind turbine blade is one of most critical systems in terms of failure as the wind turbines are rapidly becoming larger and more complicated. Developing better design procedures are on-going and the enhancements over the time are promising. However, the wind turbine blades require reliable supportive monitoring and maintenance systems to ensure the satisfactory level of asset cost effectiveness. The purpose of the paper is to review the contributions concerning the wind turbine blade defects, in order to: first, understand how the defects in wind turbine blades evolve i.e. initiate and propagate over the lifetime, and second to understand how the defects in wind turbine blades can be monitored by a number of monitoring techniques. Therefore, the defect progression scenarios which are provided by numerous researchers are presented. The paper reviews the mechanical dynamic models, testing approaches and condition monitoring techniques that are related to wind turbine blades. The paper proceeds to provide a generic defect evolution scenario. In summary, the studies of defect initiation and propagation provide fragmented understanding of the micro and macro-structure behaviour of the wind turbine blades. The studies either investigate an individual defect type at a specific location or a specific single fatigue mechanism. There are some attempts to integrate the material and damage mechanics analyses at micro-level with the macro-dynamics analysis. The capability of condition monitoring techniques depends mainly on defect type, its initiation process, its location, and its propagation behaviour and direction. Therefore, these aspects are valuable to understand together with the accelerated testing and monitoring practices in order to improve the diagnosis and prognosis procedures and to enhance the cost effectiveness of operation and maintenance practices.
Keywords: Condition monitoring; Wind turbine blade; blade defect; defect evolution; dynamic modelling.
Traditional and extended fleets in literature and practice: Definition and untapped potential
by Sini-Kaisu Kinnunen, Ari Happonen, Salla Marttonen-Arola, Timo Kärri
Abstract: The concept of fleet is traditionally discussed in certain industries, such as military, marine, logistics, and aviation industries. Recently, it has also been utilized in the asset management context, where the fleet can consist of machineries or equipment. To achieve the benefits of managing large groups of assets, it would be beneficial to exploit the learnings from the traditional fleet management fields in other environments, where fleets can be considered in an extended manner. E.g. digitalization generates massive amounts of data which can be exploited more efficiently for fleet management purposes. Data is increasingly gathered not only of physical assets but of other assets, such as business processes and humans. The literature lacks a comprehensive review of existing fleet research. The aim of this paper is to identify fleets appearing in the literature and to find out whether we should make extended fleet definitions to which the fleet management practices from traditional and well-studied fleets can be applied. The research has been conducted by reviewing the literature and describing empirical examples of different fleets. The empirical part is based on interviews made in six cases with 19 interviews in ten companies. The results indicate that traditional fleets have been studied widely, but e.g. the more complex fleets in the manufacturing industry context could be studied more deeply. In addition, fleet management learnings can be applied widely to different types of asset groups, in other words to extended fleets. There is potential to apply fleet management e.g. to improving business processes, managing complex systems as a fleet, and categorizing fleets at multiple levels.
Keywords: fleet; asset management; fleet management; physical asset; extended fleet; fleet literature; fleet decisions; case study.
Risk-Informed Decision-Making in Asset Management as a Complex Adaptive System of Systems
by Dragan Komljenovic
Abstract: Decision-making is an essential activity in Asset Management (AM). It is influenced by various factors (strategic, technical/technological, economic, organisational, regulatory, safety, markets, etc.). Sound decision-making in AM ought to take into account relevant factors in order to balance risks, opportunities, performance, costs, and benefits. Additionally, modern organisations evolve in complex operational and business environments and are exposed to significant uncertainties. In such a context, decision-making in AM becomes more challenging. This study proposes a holistic three-step Risk-Informed Decision-Making (RIDM) methodology developed for AM, where RIDM is considered a Complex Adaptive System of Systems. The methodology is applied in a case study to analyse possible modification strategies for a nuclear power plants emergency core cooling system. Through the RIDM process, quantitative models and other factors have been taken into account in order to obtain the necessary comprehensive insights regarding the decision to be made.
Keywords: Asset Management; Complex Adaptive Systems; Uncertainties; Risk-Informed Decision-Making.
Sustainability in strategic asset management frameworks: A systematic literature review
by Jyri Hanski, Ville Ojanen
Abstract: Decisions on strategic asset management often consider long lifetimes. The long-term perspective, varying types of assets, and other industry trends, such as sustainability requirements, have implications for strategic asset management frameworks. The stakeholders related to the assets are demanding actions that increase sustainability, and forward-looking organisations are adopting sustainability principles in their business. This study gives guidelines for the development of more holistic strategic asset management frameworks. Using a systematic literature review, 37 frameworks are identified and analysed based on their application area, decision level, uncertainty management practices, and asset management indicators. As a result, a conceptual sustainable strategic asset management framework is created.
Keywords: Asset management; manufacturing; infrastructure; sustainability; literature review.
A Framework for Physical Asset Risk Management in Sri Lankan Clothing Industry
by Thatshayini Premanathan, Damitha Rajini, Tharindu Karunaratne
Abstract: Increasing demand for operational efficiency in clothing manufacturing organisations necessitates the management of risks associated with their physical assets. The purpose of this paper is to develop a framework for effective Physical Asset Risk Management (PARM) in Sri Lankan clothing industry. This was approached through a multiple case study research method carrying out five case studies within the clothing industry. The required data were collected through semi- structured interviews and the data analysis was carried out using content analysis. The research findings revealed that PARM in Sri Lankan clothing industry has not received an adequate attention. Adopting standardised Risk Management (RM) procedures, convincing the top management about the importance of PARM and achieving top management support and making the stakeholders aware about PARM are the keys to achieve effective PARM in Sri Lankan clothing industry. The focus of the research is limited to the Sri Lankan clothing industry. Further, the framework presented requires validation through implementation and application of it in selected cases. The PARM framework will be a useful guide for the practitioners in the clothing industry to manage physical asset related risks effectively. It will also contribute to the knowledge by providing an understanding on PARM and a useful focus for researchers wishing to enter the PARM area.
Keywords: Physical Asset Risk Management (PARM); Clothing industry; Sri Lanka.