The definition of functional reads, “to contribute to the development or maintenance of a larger whole,” where safety’s definition states, “the condition of being safe from undergoing or causing hurt, injury, or loss.” The combination of these words presents functional safety as the growth and preservation of a safe product.
With respect to boiler assemblies, functional safety relates to all functions, including control, protection, and monitoring, intended to reduce the risk of fire, electric shock, or injury to persons.