Abbreviations of safety terms

The following list provides full names for abbreviations of safety terms used in this guide.

BPCS - Basic process control system
ESD - Emergency shutdown
HAZOP - Hazard and operability study
MOC - Management of change
MTBF - Mean time between failure
PES - Programmable electronic system
PFDavg - Average probability of failure to perform design function on demand
PHA - Process hazard analysis
PSM - Process safety management
RMP - Risk management program
RRF - Risk reduction factor
SFF - Safe failure fraction
SIL - Safety integrity level
SIS - Safety-instrumented system
SOV - Solenoid-operated valve
SRS - Safety requirements specification
SV - Safety (relief) valve