Assuring the alarm quality
Typically, the resilience add-ons may operate only in case of
hazard, and special means should be designed to ensure that the alarming is functional. The
resilience add-ons should be reliable, and special procedures should be designed to be
employed routinely, to enable early
fault detection.
Securing the alarm generation
Guidelines
- An
alarm should be generated in any event of increase in the
risk level
- When the primary, audio
alarm is muted intentionally or erroneously, the
alarm system should notify about it, and provide continuous indication as long as the primary
alarm is disabled
- The
alarm signal should be distinguished from the background noise in all operational
conditions, including
operator's fatigue
- Excessive
alarm resulting in information overload, such as reminder signal, should be avoided. For example, by using a continuous, non-disruptive indication.
Securing the alarm perception
The alarm quality is defined by the
operator's capability to recognize (become
aware of ) risky situations.
The design should consider the following attributes of alarm quality:
Updated on 12 Mar 2017.