From Theory to Practice: Unraveling Epistemological Threads in Human Reliability Assessment

Abstract

This comprehensive review explores the evolving epistemological foundations of Human Reliability Analysis (HRA), tracing its transition from a practical, applied field to a scientific discipline. The paper critically examines the philosophical assumptions that underlie prominent HRA models, emphasizing their impact on both scientific validity and practical application. Organized into five sections, the paper begins by articulating its primary aim in Section 1: to uncover and scrutinize the philosophical assumptions within HRA models. Sections 2.2 and 2.3 delve into reductionist and holistic paradigms. Section 2.4 focuses on the shift toward holistic theories, emphasizing the integration of human, technical, and organizational elements in modern socio-technical systems. Section 3 concludes by examining systemic approaches, capturing the paradigm shift from reductionism to a broader, interdependent view of accidents and reliability. Section 4 sheds light on the contemporary HRA models, emphasizing the prevalence of systemism in recent research. Notable models, such as SoTeRiA and FRAM, undergo scrutiny for their systemic approach, revealing interrelationships crucial for understanding accidents in complex operations. In Section 5, the paper explores the practical implications of the epistemological insights gained, emphasizing their potential impact on the development and enhancement of HRA models. The conclusion advocates for a paradigm shift in HRA that involves rethinking the epistemological bases of models. It underscores the need for ongoing philosophical scrutiny to drive the discipline´s progress, ultimately enhancing our understanding, prediction, and improvement of human performance and system safety.