In this paper we present a review of existing aviation safety metrics and we lay the foundation for our four-years research project entitled “Measuring Safety in Aviation – Developing Metrics for Safety Management Systems”. We reviewed state-of-the-art literature, relevant standards and regulations, and industry practice. We identified that the long-established view on safety as absence of losses has limited the measurement of safety performance to indicators of adverse events (e.g., accident and incident rates). However, taking into account the sparsity of incidents and accidents compared to the amount of aviation operations, and the recent shift from compliance to performance based approach to safety management, the exclusive use of outcomes metrics does not suffice to further improve safety and establish a proactive monitoring of safety performance. Although the academia and aviation industry have recognized the need to use activity indicators for evaluating how safety management processes perform, and various process metrics have been developed, those have not yet become part of safety performance assessment. This is partly attributed to the lack of empirical evidence about the relation between safety proxies and safety outcomes, and the diversity of safety models used to depict safety management processes (i.e. root-cause, epidemiological or systemic models). This, in turn, has resulted to the development of many safety process metrics, which, however, have not been thoroughly tested against the quality criteria referred in literature, such as validity, reliability and practicality.
As a practitioner, a manager and a scientist in social work for 40 years, I am still intrigued by the social work positioning and legitimating processes. Its recognition by users and financiers is often diffuse and its fragmentation sometimes hinders effective interventions. In social work itself, we see a range of positioning processes, most of them either legitimating social work as a promoter of social justice, a supporter of emancipation and anti-oppressive practice, or positioning social work as a therapeutic approach, treating people with socio-psychological and psychiatric disorders. Social work is often promoted as a ‘real’ profession, in need of formal recognition and in need of a precise profile. In this article it will be argued that the core of social work is about supporting people in their social functioning and should position itself in the centre of the post-modern quest: the social-psychological disorientation, the lack of meaning, and the problems of isolation and exclusion. Modern professionalism is not about demarcating and regulating but much more about ‘Entgrenzung’ and openness.
