On STPA for Distributed Development of Safe Autonomous Driving: An Interview Study

• URL: http://arxiv.org/abs/2403.09509v1
• Date: Thu, 14 Mar 2024 15:56:02 GMT
• Title: On STPA for Distributed Development of Safe Autonomous Driving: An Interview Study
• Authors: Ali Nouri, Christian Berger, Fredrik Törner,
• Abstract summary: System-Theoretic Process Analysis (STPA) is a novel method applied in safety-related fields like defense and aerospace. STPA assumes prerequisites that are not fully valid in the automotive system engineering with distributed system development and multi-abstraction design levels. This can be seen as a maintainability challenge in continuous development and deployment.
• Score: 0.7851536646859475
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Safety analysis is used to identify hazards and build knowledge during the design phase of safety-relevant functions. This is especially true for complex AI-enabled and software intensive systems such as Autonomous Drive (AD). System-Theoretic Process Analysis (STPA) is a novel method applied in safety-related fields like defense and aerospace, which is also becoming popular in the automotive industry. However, STPA assumes prerequisites that are not fully valid in the automotive system engineering with distributed system development and multi-abstraction design levels. This would inhibit software developers from using STPA to analyze their software as part of a bigger system, resulting in a lack of traceability. This can be seen as a maintainability challenge in continuous development and deployment (DevOps). In this paper, STPA's different guidelines for the automotive industry, e.g. J31887/ISO21448/STPA handbook, are firstly compared to assess their applicability to the distributed development of complex AI-enabled systems like AD. Further, an approach to overcome the challenges of using STPA in a multi-level design context is proposed. By conducting an interview study with automotive industry experts for the development of AD, the challenges are validated and the effectiveness of the proposed approach is evaluated.

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