Failure Effects Evaluation for ATC Automation System

Table 4

Scoring method of severity degree.

Score	The influence degree of the failure
1	Slight	No impact on the performance of the system.
2	Low	A slight effect on system performance.
3
4	Middle	General failure: the system performance is affected; it can be settled through the implementation of the corresponding treatment.
5
6
7	High	Serious failure: the system performance is seriously affected.
8
9	Extremely; high	Critical failure: system failure.
10