This International Standard specifies general principles and processes for the lifecycle management of alarm systems based on programmable electronic controller and computer-based human-machine interface (<named-content content-type="term" xlink:href="#term_3.1.55">HMI</named-content>) technology for facilities in the process industries. It covers all alarms presented to the operator, which includes alarms from basic process control systems, annunciator panels, safety instrumented systems, fire and gas systems, and emergency response systems.

The practices in this standard are applicable to continuous, batch, and discrete processes. There can be differences in implementation to meet the specific needs based on process type.

In jurisdictions where the governing authorities (e.g., national, federal, state, province, county, city) have established process safety design, process safety management, or other requirements, in addition to the requirements of this standard, these should be taken into consideration.

The primary function within the <named-content content-type="term" xlink:href="#term_3.1.7">alarm</named-content> system is to notify operators of abnormal process conditions or equipment malfunctions and support the response. The alarm systems can include both the basic process control system (BPCS) and the safety instrumented system (SIS), each of which uses measurements of process conditions and logic to generate alarms. Figure 1 illustrates the concepts of alarm and response dataflow through the <named-content content-type="term" xlink:href="#term_3.1.7">alarm</named-content> system. The <named-content content-type="term" xlink:href="#term_3.1.7">alarm</named-content> system also includes a mechanism for communicating the alarm information to the operator via an <named-content content-type="term" xlink:href="#term_3.1.55">HMI</named-content>, usually a computer screen or an annunciator panel. Additional functions of the <named-content content-type="term" xlink:href="#term_3.1.7">alarm</named-content> system are an alarm and event log, an <named-content content-type="term" xlink:href="#term_3.1.7">alarm</named-content> historian, and the generation of performance metrics for the <named-content content-type="term" xlink:href="#term_3.1.7">alarm</named-content> system. There are external systems that can use the data from the <named-content content-type="term" xlink:href="#term_3.1.7">alarm</named-content> system.