Preface 

This is the second edition of CSA Z1005, Workplace incident investigation . It supersedes the previous edition, published in 2017 under the title Incident investigation. The major changes to this edition include the following: a) definitions have been updated to align with the terminology found in CSA Z45001; b) the requirements of an incident investigation planning program (Clause 4.4.1) have been updated; c) the previous Clause 5 has been removed and the content revised and added to Clause 4.4.1 and Clause 6; and d) the informative Annex material has been revised and moved to CSA Z1005.1. CSA Z1005 adheres to management system principles, such as those set out in CSA Z1000, Occupational health and safety management. Use of Z1005 is not contingent on an organization having an occupational health and safety management system (OHSMS); however, it does specify a Plan-Do-Check-Act cycle to ensure that management system deficiencies are identified and addressed. CSA Z1005 also complements CSA Z1002, Occupational health and safety - Hazard identification and elimination and risk assessment and control. When hazards are identified and eliminated, and when risk is assessed and controlled in accordance with the principles in CSA Z1002, then the number of work-related incidents can be reduced or prevented. CSA Z1005 encourages the use of these investigative principles as a prevention tool. 

Principles in this standard are designed to be used before, during, or after an event to effectively respond to, or ideally, proactively eliminate, that event, similar events, or other safety deficiencies identified during the investigation, taking investigative principles beyond the traditional approach. The principles of this Standard are intended to be scalable. CSA Z1005.1, Implementation Guideline for CSA Z1005, Workplace incident investigation, was developed as a companion document that provides advice on how to best apply this Standard. CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of the Canadian Association of Administrators of Labour Law - Occupational Safety and Health (CAALL-OSH), including Provincial and Territorial Governments, as well as the Government of Canada.

CSA Group is solely responsible for the content of this Standard, and CSA Group and the funding bodies disclaim any liability in connection with the use of the information contained herein. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. 

Scope 

1.1 Inclusions This Standard specifies the requirements to address occupational health and safety (OHS) incident investigation and prevention program (IIPP). This Standard can be applied to inform investigations by organizations in any type of industry of any size. 

1.2 Exemptions This Standard does not specify requirements for criminal or regulatory enforcement investigations. Notes: 1) The investigation principles of this Standard can be applied to non-OHS investigations, such as environmental incidents. 2) Some investigations can involve, or evolve into, a criminal or regulatory investigation. Organizations need to plan for this possibility. 

1.3 Terminology In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.