BS ISO 11231:2019

What is ISO 11231 - Probabilistic risk assessment about ?  

ISO 11231 is an international standard on probabilistic risk assessment for space systems. 

ISO 11231 supports and complements the implementation of the risk management process in situations when the application of a quantitative risk assessment is deemed necessary. 

ISO 11231 defines the principles, process, implementation, and requirements for conducting a quantitative risk assessment and explains the details of probabilistic risk assessment (PRA) as applied to safety. 

ISO 11231 provides the basic requirements and procedures for the use of PRA techniques to assess safety or mission risk and success in space programmes and projects.  

ISO 11231 is applicable to all international space projects involving: 

• The design of space vehicles for the transportation of personnel in space 
• The design of space and non-terrestrial planetary stations inhabited by human beings 
• The design of space and launch vehicles powered by, or carrying, nuclear materials 
• Other projects as directed by the authorities or clients 

Who is ISO 11231 - Probabilistic risk assessment for ? 

ISO 11231 on probabilistic risk assessment for space systems is applicable to: 

• Manufacturing industries relating to aerospace related equipment 
• Aerospace and defence industries  
• Testing agencies involved in the inspection of spacecraft and aerospace equipment 

Why should you use ISO 11231 - Probabilistic risk assessment ? 

Probabilistic risk assessment (PRA) covered by ISO 11231 is a methodology used to identify and evaluate the risk to help RM activities by identifying dominant contributors to risk. This is done so that resources can be effectively allocated to address significant risk drivers. 

In addition, PRA provides a framework to assess uncertainties in events and event sequences that are important to space system safety. 

Obtaining ISO 11231 helps engineers and managers in including risk results in management and engineering practices and in the decision-making process throughout a project life cycle, for such aspects as design, construction, testing, operation, maintenance, disposal, management. 

What’s changed since the last update ? 

BS ISO 11231:2019 supersedes BS ISO 11231:2010. BS ISO 11231:2019 includes some technical changes with respect to BS ISO 11231:2010. These include 

• Updated definitions of terms 
• Simplification of clause 4 
• Updated figures and tables 
• Addition of capability-based safety, reliability, and quality assurance