I-OHSAS18000 Occupational Health and Safety Management System yindinganiso yamazwe ngamazwe eyasungulwa ngokuhlanganyela izinhlangano eziyi-13 okubalwa kuzo i-British Standards Association (BSI) kanye ne-Norwegian Classification Society (DNV) ngo-1999. Yisisekelo sokuthi inhlangano (ibhizinisi) yakhe uhlelo lokuphatha impilo nokuphepha emsebenzini. Futhi yisisekelo esiyinhloko samabhizinisi ukwenza izivivinyo zangaphakathi kanye nezinhlangano eziqinisekisa ukuthi zenza izivivinyo zokuqinisekisa. Kuyindawo eshisa kakhulu ngemuva kokusebenza kwezindinganiso zamazwe ngamazwe i-ISO9000 ne-ISO14000.