Browsing by Author "Redding, Louis E."
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Item Open Access The adoption and use of Through-life Engineering Services within UK Manufacturing Organisations(Sage, 2014-07-18) Redding, Louis E.; Tiwari, Ashutosh; Roy, Rajkumar; Phillips, Paul; Shaw, AndrewManufacturing organisations seek ever more innovative approaches in order to maintain and improve their competitive position within the global market. One such initiative that is gaining significance is ‘through-life engineering services’. These seek to adopt ‘whole life’ service support through the greater understanding of component and system performance driven by knowledge gained from maintenance, repair and overhaul activities. This research presents the findings of exploratory research based on a survey of UK manufacturers who provide through-life engineering services. The survey findings illustrate significant issues to be addressed within the field before the concept becomes widely accepted. These include a more proactive approach to maintenance activities based on real-time responses; standardisation of data content, structure, collection, storage and retrieval protocols in support of maintenance; the development of clear definitions, ontologies and a taxonomy of through-life engineering services in support of the service delivery system; lack of understanding of component and system performance due to the presence of ‘No Fault Found’ events that skew maintenance metrics and the increased use of radio-frequency identification technology in support of maintenance data acquisition.Item Open Access Data mining and knowledge reuse for the initial systems design and manufacturing: Aero-engine service risk drivers(Elsevier, 2013-09-27) Morar, Nicolau; Rajkumar, Roy; Mehnen, Jorn; Redding, Louis E.; Harrison, AndrewService providers of civil aero engines are typically confronted with a high cost of maintenance, replacement and refurbishment of the service damaged components. In such context, service experience becomes a key issue for determining the service risk drivers for operational disruptions and maintenance burden. This paper presents an industrial case study to produce new knowledge on the relationships between degradation and component design to manufacture. The study applied semantic data mining as a methodology for an efficient and the consistent data capture, representation, and analysis. The paper aims at identifying the service risk drivers based on service experience and event data. The analysis shows that the 3 top mechanisms accounting for 32% of the mechanism references have a strong Pareto effect. The paper concludes with missing information links and future research directions.Item Open Access Development of an ontology for aerospace engine components degradation in service(ScitePress, 2014-12-31) Okoh, Caxton; Roy, Rajkumar; Mehnen, Jorn; Redding, Louis E.; Harrison, AlanThis paper presents the development of an ontology for component service degradation. In this paper, degradation mechanisms in gas turbine metallic components are used for a case study to explain how a taxonomy within an ontology can be validated. The validation method used in this paper uses an iterative process and sanity checks. Data extracted from on-demand textual information are filtered and grouped into classes of degradation mechanisms. Various concepts are systematically and hierarchically arranged for use in the service maintenance ontology. The allocation of the mechanisms to the AS-IS ontology presents a robust data collection hub. Data integrity is guaranteed when the TO-BE ontology is introduced to analyse processes relative to various failure events. The initial evaluation reveals improvement in the performance of the TO-BE domain ontology based on iterations and updates with recognised mechanisms. The information extracted and collected is required to improve service k nowledge and performance feedback which are important for service engineers. Existing research areas such as natural language processing, knowledge management, and information extraction were also examined.Item Open Access Overview of Remaining Useful Life prediction techniques in Through-life Engineering Services(Elsevier, 2014-06-30) Okoh, Caxton; Roy, Rajkumar; Mehnen, Jorn; Redding, Louis E.Through-life Engineering Services (TES) are essential in the manufacture and servicing of complex engineering products. TES improves support services by providing prognosis of run-to-failure and time-to-failure on-demand data for better decision making. The concept of Remaining Useful Life (RUL) is utilised to predict life-span of components (of a service system) with the purpose of minimising catastrophic failure events in both manufacturing and service sectors. The purpose of this paper is to identify failure mechanisms and emphasise the failure events prediction approaches that can effectively reduce uncertainties. It will demonstrate the classification of techniques used in RUL prediction for optimisation of products’ future use based on current products in-service with regards to predictability, availability and reliability. It presents a mapping of degradation mechanisms against techniques for knowledge acquisition with the objective of presenting to designers and manufacturers ways to improve the life-span of components.Item Open Access Service Knowledge Capture and Reuse(Elsevier, 2014-06-30) Roy, Rajkumar; Mehnen, Jorn; Addepalli, Sri; Redding, Louis E.; Tinsley, Lawrence; Okoh, CaxtonThe keynote will start with the need for service knowledge capture and reuse for industrial product-service systems. A novel approach to capture the service damage knowledge about individual component will be presented with experimental results. The technique uses active thermography and image processing approaches for the assessment. The paper will also give an overview of other non-destructive inspection techniques for service damage assessment. A robotic system will be described to automate the damage image capture. The keynote will then propose ways to reuse the knowledge to predict remaining life of the component and feedback to design and manufacturing.Item Open Access A strategy formulation methodology for companies seeking to compete through IVHM enabled service delivery systems(Cranfield University, 2012-05) Redding, Louis E.; Baines, Tim; Ball, Peter D.This thesis makes a contribution to knowledge through the development of a strategy formulation methodology for manufacturing organisations who wish to compete through advanced technology enabled service delivery systems. The research introduces the reader to the concept of Product Service Systems (PSS) and the process of ‘servitization’. It identifies Integrated Vehicle Health Management (IVHM) as one of a set of enabling technological applications, which if adopted, can facilitate the supply of “intelligent” or “informated” products. Such products enable the manufacturer to monitor the condition and usage of these products ‘in the field’ thereby enabling aligned service solutions to be offered. A five phase research programme is undertaken which seeks to understand the principles of IVHM and gain knowledge of the level of practitioner awareness of the concept and related issues. The research then explores and defines the concept of the service delivery system, and identifies and reviews operations strategy formulation methodologies. A pre-pilot methodology is adopted which is then tested via case application to generate a list of requirements and specification. A pilot methodology is designed to suit the specification and tested via industrial case studies and expert practitioner evaluation. The pilot methodology is finally refined prior to verification and validation through industrial case application and further expert practitioner evaluation. This research delivers a sequential and iterative strategy formulation methodology which fills a gap that is identified through a state of the art literature review and practitioner survey. The documented methodology is the result of a structured development and test programme and is shown to be feasible, useable and useful by test and validation by numerous manufacturing organisations. It makes a significant contribution to knowledge. This is attained through seeking to understand the organisation’s actual competitive position, its alignment to the stakeholder’s service requirements, and organisational structure. It also offers alignment relative to the level of technology adoption when offering intelligent/informated products. The research provides a strategy formulation methodology to deliver an enhanced service delivery system.Item Open Access Through-life Engineering Services(Institute of Measurement & Control, 2013-07-31T00:00:00Z) Roy, Rajkumar; Shaw, Andy; Erkoyuncu, John Ahmet; Redding, Louis E.