| acronym,full_form,category,definition |
| ALARP,As Low As Reasonably Practicable,methodology,UK HSE risk principle: residual risk reduced until further reduction would cost grossly disproportionate to the benefit |
| ANSI,American National Standards Institute,body,Publishes Z-series safety standards (Z87.1 eye / Z89.1 head / Z16.1 incident classification) |
| API,American Petroleum Institute,body,Publishes API 510/570/653 inspection + API 580/581 RBI + API RP 754 process safety indicators |
| BBS,Behaviour-Based Safety,methodology,Observation-feedback methodology focused on at-risk behaviours; downstream of hierarchy of controls |
| BOWTIE,Bow-tie analysis,methodology,Visual risk-assessment with top event in centre and barriers preventing/mitigating causes/consequences |
| CAR,Corrective Action Request,document,Formal record of non-conformance and the action taken to close it |
| CDM 2015,Construction Design and Management Regulations 2015,regulation,UK construction safety regulations defining principal-designer/contractor duties |
| CFOI,Census of Fatal Occupational Injuries,data source,US BLS annual fatality data by industry/cause |
| COSHH,Control of Substances Hazardous to Health,regulation,UK chemical-risk-assessment + exposure-control regulations 2002 |
| DART,Days Away Restricted or Transferred,metric,OSHA recordable subset rate = (DART cases × 200000) / hours worked |
| EHS,Environment Health Safety,industry-term,North American/chemical-industry term for HSE |
| EMR,Experience Modification Rate,metric,US workers' compensation actuarial index; <1.0 = better than industry average |
| ESG,Environmental Social Governance,framework,Investor-facing sustainability reporting framework (SASB GRI TCFD ISSB) |
| FFS,Fitness-for-Service,methodology,ASME FFS-1 / API 579 assessment of equipment containing known damage |
| FRA,Fire Risk Assessment,document,UK RRO 2005 mandate for every non-domestic premises |
| GHG,Greenhouse Gas,framework,Scope 1 direct / Scope 2 purchased energy / Scope 3 value chain |
| HAZID,Hazard Identification,methodology,Broad qualitative study to flag major hazards early in design |
| HAZOP,Hazard and Operability Study,methodology,Node-by-node systematic deviation analysis using guidewords (NO MORE LESS REVERSE etc.) per IEC 61882 |
| HFE,Human Factors Engineering,discipline,Design-for-human-error-reduction discipline |
| HIRA,Hazard Identification and Risk Assessment,methodology,Common GCC term for combined HAZID + RA workflow |
| HSE,Health Safety Environment,industry-term,Also UK Health and Safety Executive regulator |
| HSG65,Managing for Health and Safety guidance,framework,UK HSE Plan-Do-Check-Act framework |
| IH,Industrial Hygiene,discipline,Recognition / evaluation / control of workplace health hazards |
| IIPP,Injury and Illness Prevention Program,regulation,Cal/OSHA §3203 mandate for every California employer |
| IIRSM,International Institute of Risk and Safety Management,body,UK-based HSE professional body |
| IOGP,International Association of Oil and Gas Producers,body,Publishes annual safety performance benchmarks |
| IOSH,Institution of Occupational Safety and Health,body,Largest HSE professional body globally; UK-based |
| ITA,Injury Tracking Application,system,OSHA electronic 300A submission portal for establishments ≥250 employees or high-hazard ≥20 |
| JSA,Job Safety Analysis,document,Step-by-step task hazard breakdown |
| JHA,Job Hazard Analysis,document,Same as JSA — different term by jurisdiction |
| LOLER,Lifting Operations and Lifting Equipment Regulations,regulation,UK 1998 regulations for lifting equipment inspection |
| LOPC,Loss of Primary Containment,metric,API RP 754 Tier 1/2 process safety indicator |
| LOTO,Lockout/Tagout,methodology,OSHA 1910.147 isolation of energy sources during servicing |
| LTI,Lost Time Injury,metric,Work-related injury resulting in time off work beyond day of incident |
| LTIFR,Lost Time Injury Frequency Rate,metric,(LTIs × 1000000) / hours worked — EU/UK/Australia convention |
| LTIR,Lost Time Incident Rate,metric,(LTIs × 200000) / hours worked — US convention |
| MOC,Management of Change,methodology,Procedural review of non-routine changes; OSHA PSM 1910.119(l) requirement |
| MSDS,Material Safety Data Sheet,document,Predecessor of SDS |
| SDS,Safety Data Sheet,document,GHS-aligned 16-section chemical safety document |
| NEBOSH,National Examination Board in Occupational Safety and Health,body,UK globally-recognised HSE qualifications board |
| NFPA,National Fire Protection Association,body,US: NFPA 70E electrical / NFPA 101 life safety |
| NIOSH,National Institute for Occupational Safety and Health,body,US CDC research arm; publishes lifting equation and RELs |
| OSHA,Occupational Safety and Health Administration,body,US federal workplace safety regulator |
| OSHAD-SF,Occupational Safety and Health Abu Dhabi System Framework,framework,40-element compliance framework for Abu Dhabi |
| PEL,Permissible Exposure Limit,limit,OSHA legal exposure limit |
| TLV,Threshold Limit Value,limit,ACGIH voluntary exposure limit (typically lower than PEL) |
| REL,Recommended Exposure Limit,limit,NIOSH recommended limit |
| WEL,Workplace Exposure Limit,limit,UK HSE exposure limit |
| PPE,Personal Protective Equipment,equipment,Last/weakest level of hierarchy of controls |
| PSM,Process Safety Management,regulation,OSHA 29 CFR 1910.119 for highly hazardous chemicals |
| PTW,Permit to Work,document,Written authorization for high-risk task (hot work / confined space / WAH / electrical / excavation) |
| PUWER,Provision and Use of Work Equipment Regulations,regulation,UK 1998 regulations |
| RA,Risk Assessment,document,Systematic evaluation of potential risks in planned activity |
| RBI,Risk-Based Inspection,methodology,API 580/581 methodology for inspection prioritisation |
| RCA,Root Cause Analysis,methodology,Systematic investigation: 5-Why / Ishikawa / ICAM / TapRooT / Apollo |
| RIDDOR,Reporting of Injuries Diseases and Dangerous Occurrences Regulations,regulation,UK 2013 incident reporting regulations |
| RTW,Return to Work,process,Post-injury return-to-work process |
| SCE,Safety Critical Element,methodology,Equipment whose failure could cause major accident; UK COMAH + Offshore SCR 2015 requirement |
| SIMOPS,Simultaneous Operations,methodology,Co-located activities with potential to interact dangerously |
| SIF,Serious Injury or Fatality,metric,Leading-indicator focus area |
| SIF-P,Serious Injury or Fatality Potential,metric,Subset of near-misses where consequence could have been serious |
| SMS,Safety Management System,framework,ICAO Annex 19 aviation mandate; broader use in rail/marine |
| SWMS,Safe Work Method Statement,document,Australia/NZ method-statement equivalent |
| TRIR,Total Recordable Incident Rate,metric,(Recordable cases × 200000) / hours worked — US convention |
| TRIFR,Total Recordable Injury Frequency Rate,metric,(Recordable injuries × 1000000) / hours worked — UK/Australia/IOGP convention |
| TBT,Toolbox Talk,activity,Short pre-shift safety briefing (5–15 min) |
| WBGT,Wet Bulb Globe Temperature,metric,Composite heat-stress index: 0.7×Twb + 0.2×Tg + 0.1×Tdb outdoors with sun |
| WHS,Work Health and Safety,industry-term,Australia/NZ replacement for OHS |
| AED,Automated External Defibrillator,equipment,Defibrillator for cardiac arrest first aid |
| ATEX,Atmosphères Explosibles,regulation,EU directives on equipment for explosive atmospheres |
| BAT,Best Available Technique,methodology,EU IPPC regulatory standard for emission limits |
| BBP,Bloodborne Pathogens,hazard,OSHA 1910.1030-regulated infection risk |
| CIH,Certified Industrial Hygienist,certification,US ABIH credential for industrial hygiene professionals |
| CMR,Carcinogenic Mutagenic Reprotoxic,classification,EU chemical-hazard classification |
| CMP,Construction Management Plan,document,Site-level construction management document |
| COMAH,Control of Major Accident Hazards,regulation,UK 2015 major-hazard regulations transposing EU Seveso |
| DCS,Distributed Control System,equipment,Process control architecture |
| DGR,Dangerous Goods Regulations,regulation,Transport of dangerous goods by air (IATA) / sea (IMDG) / rail / road (ADR) |
| DSE,Display Screen Equipment,hazard,UK term for workstation monitor/keyboard ergonomic assessment |
| DSEAR,Dangerous Substances and Explosive Atmospheres Regulations,regulation,UK 2002 explosive-atmosphere regulations |
| EAP,Employee Assistance Program,benefit,Anonymous workplace counselling and support service |
| ECP,Exposure Control Plan,document,OSHA 1910.1030 (BBP) and similar mandates |
| EEWP,Energized Electrical Work Permit,document,NFPA 70E permit for energized electrical work |
| EHO,Environmental Health Officer,role,UK environmental health enforcement officer |
| ERP,Emergency Response Plan,document,Site-specific emergency response procedures |
| ESD,Emergency Shutdown,system,Automated or manual rapid shutdown to safe state |
| FFP,Filtering Face Piece,equipment,EU disposable respirator (FFP1/2/3) |
| FMEA,Failure Mode and Effects Analysis,methodology,Systematic analysis of potential failure modes |
| GFCI,Ground Fault Circuit Interrupter,equipment,Electrical safety device cutting power on fault |
| HEPA,High-Efficiency Particulate Air,equipment,99.97% efficient air filter for ≥0.3 µm particles |
| IDLH,Immediately Dangerous to Life or Health,limit,NIOSH concentration threshold for atmosphere considered immediately life-threatening |
| IMS,Integrated Management System,framework,Combined ISO 45001 + 14001 + 9001 management |
| IP,Ingress Protection,rating,IEC 60529 dust+water-ingress equipment rating |
| JLA,Job-Level Authorisation,document,Per-task authorisation |
| KPI,Key Performance Indicator,metric,Quantitative performance measure |
| LEL,Lower Explosive Limit,limit,Lowest flammable atmosphere concentration |
| LEV,Local Exhaust Ventilation,equipment,Engineering control capturing contaminants at source |
| LFL,Lower Flammable Limit,limit,Synonym for LEL |
| LOPA,Layer of Protection Analysis,methodology,Semi-quantitative risk-assessment per IEC 61511 |
| LSIR,Location-Specific Individual Risk,metric,QRA-derived risk to person at specific location |
| NCR,Non-Conformance Report,document,Identified deviation from spec/standard |
| OBM,Oil-Based Mud,equipment,Drilling-fluid type |
| OHSAS,Occupational Health and Safety Assessment Series 18001,framework,Predecessor of ISO 45001 (deprecated) |
| PA,Preventive Action,document,Action taken to prevent future occurrence |
| PDCA,Plan-Do-Check-Act,methodology,Continual-improvement cycle (Deming) |
| PFD,Personal Flotation Device,equipment,Life jacket; also Probability of Failure on Demand in SIL |
| PHA,Process Hazard Analysis,methodology,Umbrella for HAZOP / what-if / checklist / FMEA |
| PSO,Personnel Safety Observation,activity,Field safety observation |
| PSV,Pressure Safety Valve,equipment,Pressure relief valve |
| QHSE,Quality Health Safety Environment,industry-term,QHSE = Q + HSE |
| QRA,Quantitative Risk Assessment,methodology,Numerical risk assessment with frequency × consequence |
| RACI,Responsible Accountable Consulted Informed,framework,Responsibility-assignment matrix |
| REACH,Registration Evaluation Authorisation and Restriction of Chemicals,regulation,EU chemical regulation |
| ROPS,Roll-Over Protective Structure,equipment,Tractor/heavy-equipment rollover protection |
| SCBA,Self-Contained Breathing Apparatus,equipment,Self-contained respirator with air cylinder |
| SEL,Sound Exposure Level,metric,Noise-exposure measure |
| SIL,Safety Integrity Level,classification,IEC 61508/61511 SIF reliability ranking (1–4) |
| SIS,Safety Instrumented System,system,Hardware+software for safety instrumented functions |
| SOC 2,Service Organization Control 2,framework,US AICPA security audit framework |
| SOP,Standard Operating Procedure,document,Written task procedure |
| STEL,Short-Term Exposure Limit,limit,15-minute TWA exposure limit |
| TWA,Time Weighted Average,limit,8-hour averaged exposure level |
| UEL,Upper Explosive Limit,limit,Highest flammable atmosphere concentration |
| UFL,Upper Flammable Limit,limit,Synonym for UEL |
| VCE,Vapour Cloud Explosion,event,Confined flammable vapour cloud ignition |
| WAH,Work at Height,activity,Work where person could fall and injure |
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