AMC5 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance
of changes to the functional system
ED Decision 2019/022/R
ASSURANCE
— SOFTWARE
(a) When a change to a functional system includes the introduction of new software or modifications to existing software, the service provider should ensure the existence of documented software assurance processes necessary to produce evidence and arguments that demonstrate that the software behaves as intended (software requirements), with a level of confidence consistent with the needs of the required application.
(b) The service provider should use feedback of software experience to confirm that the software assurance processes are effective and, when used, the allocated software assurance levels (SWALs) and the rigour of the assurances are appropriate. For that purpose, the effects from software malfunctions (i.e. the inability of a programme to perform a required function correctly) or failures (i.e. the inability of a programme to perform a required function) reported according to the relevant requirements on reporting and assessment of service occurrences should be assessed in comparison with the effects identified for the system concerned as per the service specification demonstration.
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