Work

A comparison of hazard analysis methods capability for safety requirements generation

Year: 2021

Type: article

Abstract: A safety-critical system comprising several interacting and software-intensive systems must be carefully analyzed to detect whether new functional requirements are needed to ensure safety. This involves an analysis of the systemic properties of the system, which addresses the effect of the interaction between systems and system parts. The paper compares two hazard analysis methods, which are often considered well-suited for such software-intensive systems: the Functional Hazard Analysis (FHA) and Systems-Theoretic Process Analysis (STPA). The focus is on the selection and improvement of the best methods, based on the lesson learned from the comparison of FHA and STPA. The analyses cover the hazard analysis processes, systemic properties, and the criteria of requirements. The paper concludes that STPA is the better choice over FHA. Insights are obtained to align both STPA and FHA methods with the broader topic on risk management, that is, hazard analysis method improvement, cautionary thinking, uncertainty management, and resilience management.

Source: Proceedings of the Institution of Mechanical Engineers Part O Journal of Risk and Reliability

DOI: 10.1177/1748006x211003463

Authors: Nanda Anugrah Zikrullah, Hyungju Kim, Meine JP van der Meulen, Gunleiv Skofteland, Mary Ann Lundteigen

Institutions: Norwegian University of Science and Technology, University of South-Eastern Norway, DNV (Norway), Equinor (Norway)

Language: English

Topic: Risk and Safety Analysis

Subfield: Statistics, Probability and Uncertainty

Field: Decision Sciences

Domain: Social Sciences

Open Access status: green

Funder: Norges Forskningsråd

Award: G5344774827