What is ISO 45001:2018? OCCUPATIONAL HEALTH AND SAFETY MANAGEMENT SYSTEMS certification ISO 45001. The purpose of an OH& S management system is to provide a framework for managing OH& S risks and opportunities. The aim and intended outcomes of the OH& S management system are to prevent work-related injury and ill health to workers and to provide safe and healthy workplaces; consequently, it is critically important for the organization to eliminate hazards and minimize OH& S risks by taking effective preventive and protective measures.