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A state where the risk has been reduced to a level that is as low as reasonably practicable (ALARP) and where the remaining risk is generally accepted.

This definition implies that a system or an activity is safe if the risk related to the system/activity is considered to be acceptable. Safety is therefore a relative condition that is based on a judgment of the acceptability of risk. The meaning of acceptable risk and ALARP is discussed further in Chapter 5.

From Definition 2.31 , safety is closely dependent on risk because it is the risk level that determines whether a system is safe or not. An important distinction between risk and safety, as defined above, is that safety is a state that either is reached or not, whereas risk is measured on a continuous scale and can be high, medium, or low or measured or expressed in other ways. This means that even if a system is safe, there will still be risk.