1. Defining required behaviour

Contextual description: The primary objective for safety assurance of any system is to demonstrate that the system’s behaviour is sufficiently safe throughout its life. The first stage of this is to understand, and to specify, what is considered to be sufficiently safe behaviour for the system. In order to define this appropriately for an RAS, there are a number of objectives that must be satisfied, as described below.

Next sections:

• 1.1 Identifying hazards (guidance available)
• 1.2 Identifying hazardous system behaviour (guidance available)
• 1.3 Defining safety requirements (guidance available)
• 1.4 Impact of security on safety (guidance available)