The objective of the study described in this paper is to define safety metrics that are based on the effectiveness of risk controls. Service providers define and implement such risk controls in order to prevent hazards developing into an accident. 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. As part of the development of alternative safety metrics, safety performance indicators were defined that are based on the effectiveness of risk controls. ICAO (2013) defines a risk control as “a defence with specific mitigation actions, preventive controls or recovery measures put in place to prevent the realization of a hazard or its escalation into an undesirable consequence”. Examples of risk controls are procedures, education and training, a piece of equipment etc. It is crucial for service providers to determine whether the introduced risk controls are indeed effective in reducing the targeted risk. ICAO (2013) describes the effectiveness of risk control as "the extent to which the risk control reduces or eliminates the safety risks”, but does not provide guidance on how to measure the effectiveness of risk control. In this study, a generic metrics for the effectiveness of risk controls based on their effectiveness was developed. The definition of the indicators allows, for each risk control, derivation of specific indicators based on the generic metrics. The suitability of the metrics will subsequently be tested in pilot studies within the aviation industry.
ICT in intelligente voertuigen levert innovatieve systemen op. Deze innovatieve systemen richten zich op maatschappelijke knelpunten (verkeersveiligheid, milieubelasting en congestie) en consumenten waarde. Recent wordt meer nadruk gelegd op maatschappelijke knelpunten. Vijf (5) a tien (10) jaar geleden werd de nadruk gelegd op het creëren van consumenten waarde. Deze innovatieve systemen moeten wel geaccepteerd worden door de eindgebruikers. Er is nog maar beperkt onderzoek gedaan naar acceptatie van veiligheidssystemen in intelligente voertuigen. Uit literatuuronderzoek komt naar voren dat verschillende vormen van acceptatie gehanteerd worden. Tevens blijkt dat veel onderzoekers spreken over acceptatie maar de acceptatie niet (kunnen) meten. Om inzicht te krijgen in het gedrag en beleving van bestuurders wordt in dit onderzoek voorgesteld om de evolutie van de cruise control (CC) naar adaptive cruise control (ACC) en naar cooperative adaptive cruise control (C-ACC) te gebruiken om acceptatie te voorspellen en te beoordelen. Er zijn bijzonder veel acceptatiemodellen en theorieën. Deze worden in de praktijk veelvuldig gebruikt binnen de Informatie en Communicatie Technologie (ICT). In deze paper wordt een route uitgezet voor het opzetten van een onderzoek waarbij gebruik gemaakt wordt van het UTAUT-acceptatiemodel. Dit onderzoek moet uitwijzen welke criteria de acceptatie beïnvloeden.
Risk matrices have been widely used in the industry under the notion that risk is a product of likelihood by severity of the hazard or safety case under consideration. When reliable raw data are not available to feed mathematical models, experts are asked to state their estimations. This paper presents two studies conducted in a large European airline and partially regarded the weighting of 14 experienced pilots’ judgment though software, and the calculation of agreement amongst 10 accident investigators when asked to assess the worst outcome, most credible outcome and risk level for 12 real events. According to the results, only 4 out of the 14 pilots could be reliably used as experts, and low to moderate agreement amongst the accident investigators was observed.
