5 Facets of an Efficient Process Hazard Analysis (PHA)
An efficient and effective PHA can enhance the safety of processes, reduce the risk of accidents and incidents, improve compliance with regu
The architecture or voting arrangment used in the field instrument or final control element of a safety instrumented system (SIS) to reach a certain safety integrity level (SIL). Voting logics include one-out-of-one (1oo1), 1oo2, 2oo2, 2oo3, etc. For example, a 2oo2 voting logic indicates there are two protective devices/instruments in a system and both devices (two-out-of-two) are needed to properly shut down the system or mitigate the hazard. 1oo2 indicates that only one of the devices would be required to properly prevent the situation from occurring.