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Featured researches published by Alfred Roelen.


AHFE 2016 International Conference on Safety Management and Human Factors | 2016

Safety Culture Development : The Gap Between Industry Guidelines and Literature, and the Differences Amongst Industry Sectors.

Nektarios Karanikas; Pedram Soltani; Robert J. de Boer; Alfred Roelen

Reason’s typology of safety culture (i.e. Just, Informative, Learning, Flexible and Reporting cultures) is widely used in the industry and academia. Through literature review we developed a framework including 36 markers that reflect the operationalization of Reason’s sub-cultures and general organizational prerequisites. We used the framework to assess to what extent safety culture development guidelines of seven industry sectors (i.e. aviation, railway, oil and gas, nuclear, healthcare, defense and maritime) incorporate academic references, and are similar to each other. Gap analysis and statistics showed that the guidelines include 53–69 % of the safety culture markers, with significant differences across subcultures and industry sectors. The results suggested that there is a gap between the industry guidelines and literature, as well as variant approaches to safety culture across the industry. The framework suggested in the study might be used as reference for completing existing safety culture development plans and constructing safety culture assessment instruments.


AUP Advances | 2018

Safety Metrics Based on Utilisation of resources

Alfred Roelen; Robbert van Aalst; Nektarios Karanikas; Steffen Kaspers; Selma Piric; Robert J. de Boer

The objective of the study described in this paper is to define safety metrics that are based on the utilisation of resources. The background of this research is a specific need of the aviation industry where small and medium-sized enterprises lack large amounts of safety-related data to measure and demonstrate their safety performance proactively. The research department of the Aviation Academy has initiated a 4-year study, which will test the possibility to develop new safety indicators that will be able to represent safety levels proactively without the benefit of large data sets. The research team has reviewed the academic and professional literature about safety performance indicators and has performed surveys into 13 companies in order to explore what, how, and why safety performance indicators are used and whether there is a statistically linear relation between SMS process metrics and safety outcomes. The preliminary results showed that companies do not use data from all SMS processes in the development of safety performance indicators, they do not ground the selection of indicators on specific criteria, they implement SMS process in different ways, but they are eager to use alternative metrics, including ones potentially to be derived on the basis of contemporary safety models and views. As part of the development of alternative safety metrics, safety performance indicators were defined that are based on the difference between required resources and available resources. Resources are people, time, equipment and budget. This work is inspired by the general notion that a large gap between ‘work as imagined’ and ‘work as done’ has a negative influence on the level of safety. Work as imagined in this context is represented by available resources and work as done by required resources. The metrics were defined by a combination of literature research and semi-structured interviews with operational practitioners in the aviation industry. The suitability of the metrics will subsequently be tested in pilot studies within the aviation industry.


Archive | 2016

Review of existing aviation safety metrics

Steffen Kaspers; Nektarios Karanikas; Alfred Roelen; Selma Piric; Robert J. de Boer


Journal of Systems and Software | 2016

Exploring the Diversity in Safety Measurement Practices: Empirical Results from Aviation

Steffen Kaspers; Nektarios Karanikas; Alfred Roelen; Selma Piric; Robbert van Aalst; Robert J. de Boer


Archive | 2016

Review of existing aviation safety metrics : RAAK PRO Project: measuring safety in aviation

Steffen Kaspers; Nektarios Karanikas; Alfred Roelen; Selma Piric; Robert J. de Boer


Air Transport and Operations Symposium | 2015

Evaluating advancements in accident investigations using a novel framework

Nektarios Karanikas; Pedram Soltani; R.J. de Boer; Alfred Roelen


AUP Advances | 2018

How much do Organizations Plan for a Positive Safety Culture? Introducing the Aviation Academy Safety Culture Prerequisites (AVAC-SCP) Tool

Selma Piric; Alfred Roelen; Nektarios Karanikas; Steffen Kaspers; Robbert van Aalst; Robert J. de Boer


AUP Advances | 2018

Complexity of Socio-Technical Systems: concept for a uniform metric

Robbert van Aalst; Nektarios Karanikas; Robert J. de Boer; Alfred Roelen; Steffen Kaspers; Selma Piric


AUP Advances | 2018

The AVAC-SMS Metric for the Self-assessment of Maturity of Aviation Safety Management Systems

Nektarios Karanikas; Selma Piric; Robert J. de Boer; Alfred Roelen; Steffen Kaspers; Robbert van Aalst


AUP Advances | 2018

Effectiveness of risk controls as indicator of safety performance

Alfred Roelen; Robbert van Aalst; Nektarios Karanikas; Steffen Kaspers; Selma Piric; Robert J. de Boer

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Pedram Soltani

Delft University of Technology

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