GM3 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system

• ED Decision 2017/001/R found in: ATM/ANS Provision of Services (2017/373) (Mar 2025)

GM3 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system ED Decision 2017/001/R SAFETY SUPPORT REQUIREMENTS The complete behaviour is limited to the scope of the change. Safety support requirements only apply to the parts of a system affected by the change. In other words, if parts of a system can be isolated from each other and only some parts are affected by the change, then these are the only parts that are of concern and so will have safety support requirements attached to them. The following list contains examples, not exhaustive, of safety support requirements that specify: (a) for equipment, the complete behaviour, in terms of functions, accuracy, timing, order, format, capacity, resource usage, robustness to abnormal conditions, overload tolerance, availability, reliability, confidence and integrity; (b) for people, their performance in terms of tasks (e.g. accuracy, response times, acceptable workload, resilience to distraction, self-awareness, ‘team-playerness’, adaptability, reliability, confidence, skills, and knowledge in relation to their tasks); (c) for procedures, the circumstances for their enactment, the resources needed to perform the procedure (i.e. people and equipment), the sequence of actions to be performed and the timing and accuracy of the actions; and (d) interactions between all parts of the system. GM3 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system ED Decision 2017/001/R SAFETY SUPPORT REQUIREMENTS The complete behaviour is limited to the scope of the change. Safety support requirements only apply to the parts of a system affected by the change. In other words, if parts of a system can be isolated from each other and only some parts are affected by the change, then these are the only parts that are of concern and so will have safety support requirements attached to them. The following list contains examples, not exhaustive, of safety support requirements that specify: (a)       for equipment, the complete behaviour, in terms of functions, accuracy, timing, order, format, capacity, resource usage, robustness to abnormal conditions, overload tolerance, availability, reliability, confidence and integrity; (b)       for people, their performance in terms of tasks (e.g. accuracy, response times, acceptable workload, resilience to distraction, self-awareness, ‘team-playerness’, adaptability, reliability, confidence, skills, and knowledge in relation to their tasks); (c)       for procedures, the circumstances for their enactment, the resources needed to perform the procedure (i.e. people and equipment), the sequence of actions to be performed and the timing and accuracy of the actions; and (d)       interactions between all parts of the system.