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Wim J. C. Verhagen

Wim J. C. Verhagen
RMIT University | RMIT · School of Aerospace, Mechanical and Manufacturing Engineering

PhD MSc Bsc

About

69
Publications
21,708
Reads
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1,058
Citations
Additional affiliations
May 2013 - present
Delft University of Technology
Position
  • Professor (Assistant)
Description
  • Research focus: maintenance operations research, including methodological and applied work on forecasting, optimization, data systems, reliability, availability and cost.

Publications

Publications (69)
Article
Global and local aviation traffic is growing while economic and performance pressures on the industry are increasing. As a consequence, airlines try to maximise their fleet utilization. Airline operators and Maintenance, Repair and Overhaul (MRO) providers therefore require as much insight as possible in factors affecting component reliability and...
Article
Full-text available
When an aircraft experiences an unexpected issue during flight operations, a technician determines whether the aircraft can safely perform the next flight. This operational decision process - known as dispatch assessment - has to happen within limited available time between aircraft arrival and departure. Currently, technicians face two main proble...
Article
This paper presents a new approach for solving the recovery of the airline schedule when disruptions have occurred. The goal is to develop an operational tool that provides the airline with a solution in less than one minute. The proposed recovery model uses a heuristic that iteratively solves selections of the airline’s fleet in order to quickly c...
Article
This paper proposes an analytical model that uses historical damage dimension data to deduce physical impactor characteristics (size and energy) that has caused a certain resulting damage. Maintenance tasks occur in operations due to impact, however the source of the damage caused in the event remains in most cases unknown. Consequently, by inferri...
Article
Aircraft maintenance has been further developed with predictive maintenance instead of solely condition-based maintenance. Prognostics and health management (PHM) with advanced technologies can utilize real-time and historical health state information to provide actionable information, enabling predictive maintenance decision-making. In this case,...
Article
Full-text available
The present study proposes an economic indicator to support the evaluation of aircraft End of Life (EoL) strategies in view of the increasing demand with regards to aircraft decommissioning. This indicator can be used to evaluate an economic performance and to facilitate the trade-off studies among different strategies. First, Disposal and Recycle...
Article
Prognostic and health management (PHM) describes a set of capabilities that enable to detect anomalies, diagnose faults and predict remaining useful lifetime (RUL), leading to the effective and efficient maintenance and operation of assets such as aircraft. Prior research has considered the methodological factors of PHM system design, but typically...
Chapter
Systems Engineering (SE) is a well-established field of research and practice. Nevertheless, the theory underlying SE is experiencing significant development, directly and in association with advancements in closely associated research domains. In this final Chapter, a socio-technical perspective is applied to identify and describe major trends in...
Chapter
The system concept has existed for several decades now, but is still a viable concept to be used to denote a problem area and to adopt a holistic view. The essence of a system is that it consists of elements and relationships between these elements, and that it exerts a function in its environment, provided it is an open system. A system can be def...
Article
Note: temporarily accessible for free (50 days) through https://authors.elsevier.com/c/1ZAMv3SU-FFusG. Abstract: Military aircraft retirements are an afterthought for many lifecycle planners. More active management of end-of-life fleets can yield increased confidence in fleet capability and retirement timelines. This work provides fleet managers...
Article
Prognostic and Health Management (PHM) systems support aircraft maintenance through the provision of diagnostic and prognostic capabilities, leveraging the increased availability of sensor data on modern aircraft. Diagnostics provide the functionalities of failure detection and isolation, whereas prognostics can predict the remaining useful life (R...
Article
This paper proposes an analytical model capable of relating damage found on a composite plate to a given impactor characteristic (size and energy). The model addresses a gap in knowledge regarding the types of damages to be expected over the lifetime of a new generation of composite aircraft. The damage type and dimensions are estimated using a sup...
Article
Full-text available
Airline operators face accidental damages on their fleet of aircraft as part of operational practice. Individual occurrences are hard to predict; consequently, the approach towards repairing accidental damage is reactive in aircraft maintenance practice. However, by aggregating occurrence data and predicting future occurrence rates, it is possible...
Article
SmartBasing provides fleet managers tools with which to manage their end-of-life aircraft fleets. The principles of SmartBasing include reassigning aircraft to different bases and assigning aircraft to a new mix of mission types to actively manage the remaining useful lifetime of each aircraft in a fleet. This paper employs a single case study airc...
Article
Transdisciplinary processes have been the subject of research since several decades already. Transdisciplinary processes are aimed at solving ill-defined and socially relevant problems. Many researchers have studied transdisciplinary processes and have tried to understand the essentials of transdisciplinarity. Many engineering problems can be chara...
Book
This book details the foundations, new developments and methods, applications, and current challenges of systems engineering (SE). It provides key insights into SE as a concept and as an approach based on the holistic view on the entire lifecycle (requirements, design, production, and exploitation) of complex engineering systems, such as spacecraft...
Conference Paper
Full-text available
Transdisciplinary research (TDR) has been the subject of discourse in the past few decades, but has bot been studied much in the context of engineering problems. Many engineering problems can be characterized as ill-defined, like open innovation, adoption of new technology, business development, and the adoption of the Industry 4.0 concept. Transdi...
Article
Unscheduled maintenance can contribute significantly to an airline's cost outlay. Reliability analysis can help to identify and plan for maintenance events. Reliability analysis in industry is often limited to statistically based approaches that incorporate failure times as the primary stochastic variable, with additional strict assumptions regardi...
Article
Full-text available
A decision support framework is proposed, allowing for the integration of aircraft maintenance work progress monitoring into the aircraft maintenance planning decision support process. The framework is able to monitor the progression of planned maintenance by analysing real-time data on work progress. This can be used to explore optimal task planni...
Article
Full-text available
This research proposes a decision support tool which identifies cost-optimal maintenance decisions for a given planning period. Simultaneously, the reliability state of the component is kept at or below a given reliability threshold: a failure limit policy applies. The tool is developed to support repair-or-replacement decision making for composite...
Article
This paper proposes an approach towards multi-criteria decision making (MCDM) for operational maintenance processes. It focuses on decision alternative identification and evaluation for short time horizons, thereby addressing problems that need to be resolved in hours or a few days at maximum. This addresses a gap in literature, where MCDM methods...
Article
Full-text available
This article presents a retirement analysis model for aircraft fleets. By employing a greedy algorithm, the presented solution is capable of identifying individually weak assets in a fleet of aircraft with inhomogeneous historical utilization. The model forecasts future retirement scenarios employing user-defined decision periods, informed by a cos...
Conference Paper
Full-text available
The system concept is a widely-used concept in research and practice. Already in the 50s of the previous century, a community was created to investigate interrelationships between domains and create a theory surpassing and comparing domains. The General Systems Theory (GST) community has tried to come up with such a theory for several decades. The...
Article
The use of documentation for task support in aircraft line maintenance is still mostly paper-based, which is slow, burdensome and prone to error. This paper provides an overview of the issues associated with the use of paper-based documentation in aircraft line maintenance and describes the development of a novel concept for contextualised document...
Book
Full-text available
The Concurrent Engineering (CE) approach was developed in the 1980s, based on the concept that different phases of a product life cycle should be conducted concurrently and initiated as early as possible within the Product Creation Process (PCP). CE concepts have matured and become the foundation of many new ideas, methodologies, initiatives, appro...
Article
Military attack aircraft are susceptible to the harmful effects of widespread fatigue damage caused by cyclic loading of structural components, which leads to airframe retirement. Modern structural health monitoring techniques use a multitude of sensors and high data collection rates. Some legacy airframes, which are most susceptible to fatigue dam...
Article
Full-text available
The primary objective in military aviation is to optimize operational readiness: the capability to perform assigned flight missions. In terms of a flight planning process, operational readiness has three primary components: availability, serviceability and sustainability. Furthermore, it is influenced by aircraft downtime due to preventive maintena...
Conference Paper
Full-text available
A short lead time of the Product Development Process (PDP) is an important competitive advantage for companies. Design automation solutions provide a means to reduce the lead time and improve quality, but their development requires some investment. Before a company can commit to the development of an automation initiative, it requires an estimation...
Conference Paper
Full-text available
CE has been used for more than two decades now. Despite many successes and advantages, there are still many challenges to be addressed. These challenges are both technical and organisational. In the paper we will address the current challenges of CE. Many challenges are related to the exchange of data and knowledge and to the systems that make data...
Book
Full-text available
This book of proceedings contains papers peer reviewed and accepted for the 22nd ISPE Inc. International Conference on Concurrent Engineering, held at the TU Delft, The Netherlands, July 20–23th, 2015. This is the second issue of the newly introduced series “Advances in Transdisciplinary Engineering” which publishes the proceedings of the CE confer...
Article
A comprehensive method is presented to estimate aircraft component production costs using Knowledge Based Engineering (KBE) techniques. A suite of parametrical cost estimation blocks are treated as Cost Primitives (CPs), which contain attributes such as cost types, cost driving parameters, and cost estimation relationships. A CP is associated with...
Article
Context: Automation of engineering processes is increasingly prevalent in multiple lifecycle phases such as design, manufacturing and service support. Though methodological and technological support for developing these systems has been achieved to a relatively high degree, means to provide objective identification and justification of automation o...
Chapter
Full-text available
Concurrent Engineering (CE) was conceived as an important concept in 5 the ‘80s of the previous century. It has been studied and practiced extensively since 6 then in many forms and under various names. Although the term CE is not in 7 frequent use any more these days, the concept has grown, both conceptually and in 8 importance. Actually, the conc...
Chapter
Full-text available
The handling of knowledge represents the key to competitiveness, with company-specific product and process knowledge marking a unique position with respect to competition. Knowledge-based engineering (KBE) is a comprehensive application of artificial intelligence in engineering. It facilitates new product development by automating repetitive design...
Chapter
Full-text available
Despite a long pedigree and many positive reports on its use and benefits, concurrent engineering (CE) and its associated research (sub)domains still experience significant development. In this final chapter, a sociotechnical framework is applied to classify and analyze challenges identified as part of the foundations, methods and applications disc...
Chapter
With the increasing size and complexity of development projects at large companies and organizations in the aviation industry, concurrent engineering (CE) and integrated aircraft design has become of crucial importance in the design process of new products. In order to remain a competitive position and achieve a customer driven approach, aspects of...
Book
Presenting the gradual evolution of the concept of Concurrent Engineering (CE), and the technical, social methods and tools that have been developed, including the many theoretical and practical challenges that still exist, this book serves to summarize the achievements and current challenges of CE and will give readers a comprehensive picture of C...
Article
An approach for the optimisation of maintenance intervals is introduced, incorporating several distinct elements. First of all, Weibull analysis provides a generalisable means to estimate reliability of non-repairable products. Next, an optimisation model has been developed that employs maintenance interval length to optimise for cost under specifi...
Conference Paper
This paper presents a Multidisciplinary Design Optimization (MDO) method to minimize the Direct Operating Cost (DOC) and maximize the Surplus Value (SV) for aircraft components restricted by structural constraints. A parameterized DOC/SV analysis is proposed to link cost performance and the structural design properties. This analysis is based on co...
Conference Paper
Full-text available
The handling of knowledge represents the key to competitiveness, with company-specific product and process knowledge. Knowledge-based engineering facilitates new product development by automating repetitive design tasks through acquisition, capture, transform, retention, share, and (re-)use of product and process knowledge. This paper highlights tw...
Article
Full-text available
Aircraft maintenance can be divided into routine and non-routine activities. Material demand associated with non-routine maintenance is typically intermittent or lumpy: it has a large variance in frequency and quantity. Consequently, this type of demand is hard to predict. This paper introduces a method to collect time series datasets for aircraft...
Article
Maintenance cost of composite aircraft components are generally estimated based on the actual maintenance practices. The estimate is only available for the operating group while not for the design and manufacturing engineers. Moreover, the influence of component attributes are not considered, missing the link from component to maintenance task sche...
Article
In this paper, a Knowledge Lifecycle Model is proposed to enable the characterisation and quantification of change in knowledge elements, which is a potentially important contributing factor in judging the applicability of the knowledge-based system approach for business and engineering tasks.. The model consists of knowledge states and knowledge a...
Article
A method is developed to forecast material demand caused by aircraft non-routine maintenance. Non-routine material consumption is linked to scheduled maintenance tasks to gain insight in demand patterns. Subsequently, a suitable prediction model can be applied to forecast material demand. To test this approach, a structural part selection of the Bo...
Article
A relatively low level of digitalization in the maintenance domain, a reliance on legacy, paper-based work processes and systems and a lack of information exchange across stakeholders work together to complicate the consistent execution and record keeping of maintenance tasks. This has a negative effect on the efficiency and costs of product suppor...
Article
Full-text available
The progressive industrialisation of composite-built aircraft is putting manufacturing engineers on a steep learning curve. An opportunity exists to use knowledge management tools to capture, share and reuse knowledge over multiple aircraft programs and maintain the constant flow of learning gained during aircraft program delivery. This article rep...
Article
Literature on Knowledge-Based Engineering (KBE) has identified challenges concerning the personalization and codification of knowledge for new product development, such as maintaining the quality, accessibility and traceability of knowledge for inspection, review and re-use, as well as managing the life-cycle of KBE applications and the knowledge c...
Article
Knowledge-Based Engineering (KBE) is a research field that studies methodologies and technologies for capture and re-use of product and process engineering knowledge. The objective of KBE is to reduce time and cost of product development, which is primarily achieved through automation of repetitive design tasks while capturing, retaining and re-usi...
Chapter
This paper focuses on the development of an ontology for the aerospace composite manufacturing domain. It uses an amalgam of ontology development methodologies to arrive at a semi-formally declared ontology, which is tested for practical validity in a case study focusing on the construction of an architecture for a knowledge-based engineering solut...
Article
Existing knowledge-based engineering methodologies offer opportunities for improvement, as the multidisciplinary character of engineering design is not well implemented and as the current methodologies are not optimally substantiated. To better address the integration of multidisciplinary engineering knowledge within a knowledge based engineering (...
Conference Paper
The paper is associated with the integration of multi-disciplinary knowledge within a Knowledge Based Engineering (KBE)-enabled design framework. To support this integration effort, the KNOMAD methodology has been devised. KNOMAD stands for Knowledge Optimized Manufacture And Design and is a methodology for the analytical utilisation of multi-disci...
Chapter
Knowledge-Based Engineering (KBE) is a developing research field that studies technologies for capture and re-use product and process engineering knowledge to reduce time and cost of product development. KBE has held great promise since its inception, but evolution in the technologies and notions underlying KBE as well as significant challenges tow...
Chapter
The paper is associated with Manufacturing Knowledge Management and so that stream of the work has been formalised into the KNOMAD methodology. The Knowledge Optimized Manufacture And Design (KNOMAD) is a methodology for the analytical utilisation of manufacturing knowledge within design. The main contribution is to highlight the validity of the KN...
Chapter
Quantitative analysis with respect drivers of customer satisfaction in a projectoriented, business-to-business environment is very scarce. The aim of this paper is to make headway into this terrain by statistical analysis of quantitative empirical research. Five drivers of satisfaction are posited. Analysis of 41 observations shows that the overall...
Article
Full-text available
Quantitative analysis with respect to co-innovation is very scarce. The aim of this paper is to make headway into this terrain by quantitatively analyzing the effect of co-innovation on the value-time curve in terms of indicators from Beelaerts’ 3C model. Analysis of car manufacturer market data shows that co-innovation decreases time-to-market an...

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Projects

Projects (2)
Project
The AIRMES project focusses on optimising end-to-end maintenance activities within an operator’s environment. It will develop and validate an innovative, state-of-the-art, integrated maintenance service architecture that will be a key step in achieving the goal of no technically-induced aircraft operational disruptions in European air traffic. The AIRMES consortium is led by an airline / MRO that has a clear vision, and is keen to exploit radically new and challenging ways to achieve their objectives. They are supported by expertise in systems health monitoring, semantics, knowledge based engineering, architecture, diagnostics, prognostics, maintenance planning and optimisation, and mobile tools for remote support of maintenance activities. Truly a unique consortium. The service architecture will be structured around an operationally focused collaborative IT environment, integrating multiple functionalities and it will accelerate the shift in European aviation, from scheduled maintenance to condition-based maintenance. By blending this knowledge based environment with mobile tools for remote support, using augmented reality technologies and two way communication solutions, the resulting service architecture will provide contextualised, updated and integrated information to all members of the maintenance value chain. The impact of this project on European Air Traffic will be significant. In Europe, 5.8% of all flights are delayed due to direct aircraft technical causes and consequential delays on subsequent flights; the cost of this disruption is estimated at 2.8 B€. By reducing operational disruptions, reducing the average delay time and improving aircraft utilisation, through a grant value of 4.6 M€, the impact of this 48 month, 12 partner AIRMES project will be significant and assessed to around 1B€ per year.