GM1
ATM/ANS.OR.C.005(b)(2) Safety support assessment and assurance of changes to
the functional system
ED Decision 2017/001/R
MONITORING OF INTRODUCED CHANGES
(a) Monitoring is intended to maintain confidence in the safety support argument during operation of the changed functional system. Monitoring is, therefore, only applicable following the entry into service of the change.
(b) Monitoring is likely to be of internal parameters of the functional system that provide a good indication of the performance of the service. These parameters may not be directly observable at the service level, i.e. at the interface of the service with the operational environment. For example, where a function is provided by multiple redundant resources, the availability of the function will be so high that monitoring it may not be useful. However, monitoring the availability of individual resources, which fail much more often, may be a useful indicator of the performance of the overall function.