SARSSi*: a Safety Requirements Specification Method based on STAMP/STPA and i* language

Abstract

Context: traditional hazard analysis techniques were not proposed to be used in the Requirements Engineering (RE) process. Objective: The aim of this work is to present and discuss a new method for early safety requirements specification called SARSSi* to be used at the beginning of the development of safety-critical systems. Method: this goal is achieved through the combination of two techniques: (1) STAMP/STPA; and (2) i* language. Results: this paper attempts to bridge the gap between two parallel trends in systematic safety approaches – the combination of requirements and safety engineering techniques. Our method consists of six steps and guidelines to perform a preliminary hazard analysis and facilitate the systematic identification of safety-critical functions and components. Conclusions: We demonstrate the utility of our method by applying it in a real industry case study. The initial results show preliminary suitability of our method and its contribution to improving the visualization of the information generated in the hazard analysis such as the hazards, their causes, environmental conditions, and safety requirements.

A Requirements Specification Method: An Experience Report in Aerospace

“…Generally, every time a late client has access to the project, new ideas emerge. Depending on the meeting formality, this information can only be verbalized without further documentation [10].…”

“…This work intends to present how these three technical requirement debts were addressed in a practical aerospace project by applying the proposed method in a previous written requirements document. Create a documentation template that integrates communication and evolves with the development flow [10]. Thus, creating design "memory" and allowing future revisions of the decisions taken over time [8].…”

Requirements4Safety – Construindo uma Técnica para Modelagem de Requisitos Iniciais de Segurança

“…O trabalho de [23] por sua vez, apresenta a abordagem SARSSi*, que propõe especificar requisitos iniciais de segurança através de seis passos e guias combinando a técnica de análise de perigos STPA, com a técnica de modelagem de requisitos orientada a objetivos iStar, gerando assim uma Análise Preliminar de Segurança. Uma importante diferença dessa abordagem para a técnica Requirements4Safety é que a primeira utiliza iStar na sua versão padrão para modelar elementos de segurança, adicionando tags às descrições dos elementos, enquanto a última usa a versão estendida de iStar 2.0, ou seja, iStar4Safety, que adiciona elementos, criando uma extensão peso-leve, através do uso de diferentes cores e também de estereótipos nos elementos filhos criados.…”

Goal-Oriented Requirements Engineering: State of the Art and Research Trend

“…In 2019 the SARSSI * method was published for safety requirements specification. This method combines STAMP / STPA (Systems-Theoretic Accident Model and Processes) and i * language [31].…”