3.1 Identifying potential deviation from required behaviour

Contextual description: Deviations may occur in any of the element of the RAS architecture (Sensing, Understanding, Deciding, Acting and Infrastructure).  The potential deviations, and their impact on the satisfaction of safety requirements must be identified for each of the elements and the RAS as a whole.

Practical guidance:

There are standard methods of identifying deviations (such as HAZOP) which may be applied to meet this objective. The way in which this objective is demonstrated may be different for different elements of the architecture. There may, for example be  common failure modes associated with particular technologies that must be managed for each element, as defined in the following sub-sections.

Next sections:

• 3.1.1 Sensing deviations (guidance available)
• 3.1.2 Understanding deviations
• 3.1.3 Deciding deviations
• 3.1.4 Acting deviations
• 3.1.5 Infrastructure deviations
• 3.1.6 Machine learning deviations
• 3.1.7 Interactions deviations
• 3.1.8 Human/machine interaction failures