2oo4d accident accidents accumulative risk alarm annunciator alarp ansi/isa s.84 api 521 architecture asil asset management audit automatic code generation automatic documentation availability bayesian updating bpcs buncefield burner management system caex certification common cause common cause failures communication compliance component failure analysis consequence matrix content management control cost reduction cost-benefit analysis cots demand mode diagnostic coverage diagnostics digital valve controller documentation emc emergency shutdown system emi en 50402 en 746 en/iec 60079–29–1 failure incident failure rate data failure rates fieldbus fire and gas fired equipment fmeda foundation sif full stroke functional modules functional safety gas detection gas sensors gas turbine global risk hardware hazard and operability analysis hazard and operability study hazop hazop templates heterogeneous hipps iec 61131 iec 61131-3 iec 61508 iec 61511 iec 62061 iec 61508 incident investigation independent protection layer instrumentation and control iso 26262 knowledge-based system layer of protection layer of protection analysis life cycle lifecycle management liquiphant lock-up valve lopa management management of change markov memory metrological standards microcontroler mttfs namur 93 nfpa 72 oem online changes operator over spill protection overspeed protection p&id flowchart paag partial stroke partial stroke testing pha prior use process hazop process risk process safety proof test interval proof testing proven in use qs9000 quality data quality management redundancy reliability reliability data reliability engineering reliability program requirements definition review risk graphs risk matrix risk reduction risk reduction factor rule-based system safe-t-core safeguard safety safety goal safety instrumented function safety instrumented system safety instrumented systems safety integrity level safety lifecycle sensor poisoning sif signature test sil sil determination methods sil evaluation sil-capability sil verification silstroke sis sis design software solenoid valves spurious trip standardisation state transition modelling sulphur recovery tank farm test bench texas city thermal burner tolerable risk training tridefine type testing valve testing valves vdi 2180 verification