OHSAS to ISO 45001 Transition

SIS TEAM’s team members(IC team, Auditors, TEs, Associates and staff) have been encouraged to start briefing their clients from the DIS stage and can, if requested, start to perform gap analySIS team between their clients’ systems and the DIS.

SIS TEAM’s shall keep track of all evaluation activities during the DIS stage or latest draft stage document before the IS for full verification at the time of the migration audit to ISO 45001:2018.

Accredited certifications to ISO 45001:2018 shall only be issued once the SIS TEAM has been accredited to deliver certification to the new standard and after the organization has demonstrated conformity to ISO 45001:2018.

Based on the agreement with the organizations certified to OHSAS 18001:2007, SIS TEAM’s can conduct migration activities during a routine surveillance, re-certification audit or a special audit. Where migration audits are carried out in conjunction with scheduled surveillance or re-certification (i.e. progressive or staged approach) then a minimum of 1 auditor man-day is required to be added to cover existing and new requirements implied by ISO 45001:2018. Recognizing that each client and migration audit is unique and audit duration will be increased above the minimum as needed to sufficiently demonstrate conformity to ISO 45001:2018.

SIS TEAM’s shall communicate their migration arrangements to their clients at the earliest opportunity. It is recommended that this is done at the DIS or latest draft stage document before the IS.

SIS TEAM’s shall develop migration plans to address the following:

  1. i) Training and verification of competence of auditors and other staff.

NOTE 1: While SIS TEAM’s are encouraged to commence training at the DIS stage, they should be aware that additional training may be required to address any differences between the DIS or latest draft stage document and the final published standard.

NOTE 2: SIS TEAM’s should note that ISO/CASCO WG 48 is developing ISO/IEC TS 17021-10 which will include specific competence requirements for auditing and certification to an OHSMS. Furthermore, it is to be noted that a new IAF MD on OH&SMS is under development and that it shall be used for all ISO 45001:2018 accreditation activities.

  1. ii) The SIS TEAM’s arrangements for communicating with its clients.


iii) The SIS TEAM’s arrangements for auditing conformity to the new standard. For example, will it be a single visit or a staged approach.

  1. iv) How the SIS TEAM will ensure clients’ ongoing conformity to OHSAS 18001:2007 through the migration process.
  2. v) How the SIS TEAM plans to use the results of any evaluation activities conducted during the DIS or latest draft stage document before the IS.
  3. vi) Action to be taken in respect of clients that have failed to complete the migration by three years after the publication of ISO 45001:2018. For example, the level of audit necessary for certification to be restored.

The following shall also be ensured:

  1. i) All issues that require client action for conformity with the new requirements shall be clearly identified and raised as documented findings.
  2. ii) Only when all identified outstanding issues have been appropriately addressed and the effectiveness of the management system demonstrated, can auditors recommend certification to the published ISO 45001:2018 standard.

iii) Records shall be available to verify that all prior migration audit findings have been evaluated for corrective action and conformity before any recommendation for approval to ISO 45001:2018 can be made.

  1. iv) The SIS TEAM shall ensure that the evaluation of a client’s conformity to the new requirements during the migration phase does not interfere with the client’s on-going conformity to OHSAS 18001:2007.
  2. v) Where evaluation activities have taken place at the DIS or FDIS, a review will be undertaken by the Decision Maker to ensure the validity of such activity is taken into account in the decision process.
  3. vi) The decision to issue certification to ISO 45001:2018 shall only be made once actions in respect of all outstanding major non-conformities have been reviewed, accepted and verified and the client’s corrective action plan for any minor non-conformity has been reviewed and accepted.