PUBLISHED PAPERS
2025 |
Comparative Safety Analysis of FHA, STPA, and FRAM: Insights from the TAM Flight 3054 Accident Proceedings Article Vitor Henrique Oliveira Bourguignon; Guilherme Conceição Rocha Resumo | Links | BibTeX | Tags: Aviation safety, FHA, FRAM, hazard analysis, STPA @inproceedings{Bourguignon2025ComparativeSafety,This paper evaluates three hazard analysis methods in the context of aircraft system safety: Functional Hazard Assessment (FHA), Systems-Theoretic Process Analysis (STPA), and the Functional Resonance Analysis Method (FRAM). The study applies these methods to the TAM Flight 3054 accident case, highlighting the capabilities and limitations of each approach. The analysis shows that while FHA meets regulatory requirements by identifying functional failure conditions, STPA expands the analysis by addressing human interactions and control logic issues. FRAM complements both by revealing how normal performance variability and organizational factors can combine to produce accidents. The findings indicate that no single method alone is sufficient to ensure safety in complex systems. A combined approach integrating these methodologies is recommended to provide a more robust and comprehensive safety assessment in aeronautical system design. |
2021 |
STPA Analysis over the earlier phases of military products life cycle Proceedings Article Guilherme M B Moreira; Willian Limonge; Carlos H N Lahoz; Christopher S Cerqueira; Willer G Santos Resumo | Links | BibTeX | Tags: mission accomplishment verification, STPA @inproceedings{Guilherme2021STPAb,Airworthiness Certification is a globally accepted process to attest civil aircraft safety over the compliance with a set of requirements (certification basis) that aims to avoid the occurrence of aeronautical accidents due to design issues. Considering military airworthiness, in a similar way, the mission accomplishment verification process, in a product development contracted by the Brazilian Air Force (FAB), should seek to meet the needs and capacities to be acquired by FAB to support operational units. Therefore, clear mission requirements are key points for a good contract execution. This study has made use of a robust hazard analysis technique (STPA - System-Theoretic Accident Model and Processes) in order to investigate the causal factors which leads to negative impacts on the contract elaboration process for aeronautical military products in Brazil. STPA uses System Theory to model any process as a feedback- control structure. Focusing on losses we want to avoid, the method considers the hazards, safety constraints, unsafe control actions, causal factors and based on that, proposes requirements (which can be understood as recommendations), showing a path throughout the earlier phases of Brazilian military products life cycle to improve the contract elaboration process. |
2017 |
ASTROS 2020 - Um estudo de caso da análise multidisciplinar da segurança Proceedings Article Moisés Silva Rodrigues; Sidnei Barbieri Resumo | Links | BibTeX | Tags: ASTROS 2020, Safety, STPA @inproceedings{Mois\'{e}s2017safetyb,Sendo a segurança, caracterizada por suas dimensões safety e security, um requisito inerente a qualquer projeto de sistemas, verifica-se ser fundamental que a mesma seja sempre objeto de análise no gerenciamento de riscos, devendo estar presente desde as fases iniciais da concepção até um eventual descarte. Assim, o presente trabalho se propõe a apresentar algumas técnicas de análise de safety, com suas diferenças e similaridades, exemplificando sua aplicação, tendo, para isso, como objeto o Sistema de lançamento múltiplo de foguetes ASTROS 2020, atualmente em desenvolvimento no Brasil. |