Active STPA : integration of hazard analysis into a Safety Management System Framework
Name
1143739911-MIT.pdf
Size
29.89 MB
Format
Adobe PDF
Checksum (MD5)
5a1a19a0c4d86787d7ef6f081b1100b0
Author(s)
Silva Castilho, Diogo.
Advisor(s)
Nancy G. Leveson.
Alternative Title
Active Systems-Theoretic Process Analysis
Integration of hazard analysis into a Safety Management System Framework
Date Issued
2019
Publisher
Massachusetts Institute of Technology
Abstract
This dissertation describes a new approach to integrate a hazard analysis into Safety Management Systems (SMS). This new engineering process guides safety managers and analysts in the identification of a migration toward states of higher risk. The solution is the use of an active version of STPA (Systems-Theoretic Process Analysis), a hazard analysis tool based on Systems-Theoretic Accident Model and Processes (STAMP). The Active STPA uses data collected during operations, such as Flight Data Monitoring events and voluntary reporting, to identify leading indicators of increasing risk. The events are compared with the STPA. The discrepancies lead to a reasoning about previous assumptions on human behavior and the environment in which the system operates. New defenses are identified and implemented. The output of the process is a set of new defenses for prevention and mitigation that will enforce the requirements and constraints generated by the STPA, allowing the generation of cumulative knowledge on system behavior over time. The feedback on SMS activities allows targeted safety improvement activities and provides qualitative information for hazard management integrating Active STPA into an SMS. Most of the indicators currently in use in the aviation industry are reactive because they measure only parameter exceedances. Active STPA allows a proactive identification of the potential cause of future accidents.
Description
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2019
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 135-137).
Subjects
Aeronautics and Astronautics.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Terms of Use
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