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. 2014 Dec 4;8(12):e3345. doi: 10.1371/journal.pntd.0003345

Table 3. Evaluation criteria and ranking system for the detection of a cause of failure.

Detection Criteria: likelihood of detection by design control Rank
Absolute uncertainty Design control does not detect a potential cause of failure or subsequent failure mode; or there is no design control 10
Very remote Very remote chance the design control will detect a potential cause of failure or subsequent failure mode 9
Remote Remote chance the design control will detect a potential cause of failure or subsequent failure mode 8
Very low Very low chance the design control will detect a potential cause of failure or subsequent failure mode 7
Low Low chance the design control will detect a potential cause of failure or subsequent failure mode 6
Moderate Moderate chance the design control will detect a potential cause of failure or subsequent failure mode 5
Moderately high Moderately high chance the design control will detect a potential cause of failure or subsequent failure mode 4
High High chance the design control will detect a potential cause of failure or subsequent failure mode 3
Very high Very high chance the design control will detect a potential cause of failure or subsequent failure mode 2
Almost certain Design control will almost certainly detect a potential cause of failure or subsequent failure mode 1