OHSAS 45001 is an internationally recognised occupational, health and safety management system series standard. The OHSAS 45001 standard is based on the similar ISO 9001 and ISO 14001 Plan - DO - Check - Act structure. To achieve certification to OHSAS 45001 an organisation must have a health and safety management system compliant with the requirements of the OHSAS 45001 standard. The standard also requires a company to have appropriate health and safety policies, procedures and protocols to ensure it is a safety conscientious organisation.