Over the past years, there has been an unprecedented increase in companies looking for external certification for processes of various types. The traditional example concerns the certification of the Quality Management System (QMS) based on ISO 9001, whose popularity is still incomparable (Lo et al., 2014). However, due to the growing pressure from several groups of stakeholders such as customers and government agencies for sustainability certification (Marshall et al., 2015) associated with environment (ISO 14001) -Environmental Management System (EMS) -and workforce certifications, aspects of occupational health and safety (OH&S) have been showing an increasing global interest. In this context, the ISO 45001 standard was published in 2018 in an unprecedented way in order to offer companies a unique and clear structure to improve the OH&S performance. This standard replaces OHSAS 18001 published for the first time in 1999 by the British Standard Institute (BSI) and with definitive withdrawal in March 2021 (British Standards Institution, 2020).According to Uzun et al. ( 2018), ISO 45001 describes a more advanced management system than OHSAS 18001 does, with more clearly defined terms, definitions, functions and scope. Like other management

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