Not sure what you mean by "lean heavily". My goal here is to substantiate my opinion on why "people can audit their own work" is against the requirements of ISO 9001, sound quality management principles, counterproductive and against risk based thinking. In this thread alone, I posted and hyperlinked a good number of associated and relevant documents. For those who think : if it is not in the (9001) standard, I don't care, sorry for bursting the bubble.
If people still believe that "people can audit their own work", while complying with ISO 9001, I don't give a rat's ass. Go for it and just do it. Quality system management, ISO 9001 implementation and auditing has been going on a downward spiral for a long time. People want loopholes, shortcuts, templates, etc...
I will remain on the side of standards and certifications as confidence-building components, assuring business in it's supply chain risks.
I spent a lot of time and effort on this thread, knowing full well that some people will never be convinced by my arguments, but I see my participation in The Cove as my little legacy and possible influence to the people involved in writing standards (most of them are shy voyeurs here) that they need to improve the clarity of their products.
While I've long been under the impression that people are not allowed to audit their own work, in an audit context, I prefer to defer to the standard. ISO 9001 itself does not explicitly ban auditing your own work. The ISO 9002 clause (9.2.2 paragraph 4) that Big Jim quoted explicitly states that auditing your own work is not only allowed, but necessary in some cases. While ISO 9002 is not a normative reference in ISO 9001, it is the official ISO guidance on ISO 9001 and published by TC 176, so it should be given consideration.
Sidney, do you disagree with ISO 9002 9.2.2 paragraph 4? Do you think a third-party auditor should write a finding if they find that an internal auditor audited their own work in a way that met the guidance of ISO 9002 9.2.2 paragraph 4?
ISO/TS 9002 published November 1st 2016. Quality Management System Guidance for the Implementation of ISO 9001:2015
Yes, it says guidance, but it was published by TC 176, The introduction starts out with "This document has been developed to assist users to apply the quality management system requirements of ISO 9001:2015 Quality management systems – Requirements."
The format follows the same numbering system as ISO 9001:2015, and here is what we find in the fourth paragraph of 9.2.2:
"When assigning persons to conduct audits, the organization should ensure objectivity and impartiality of the audit process. In some cases, specifically in smaller organizations or areas of the organization where specific job knowledge is required, it can be necessary for a person to audit their own work. In this situation, the organization might have the internal auditor work with a peer, or have the results reviewed by a peer or a manager, to ensure results are impartial. The organization could also consider obtaining resources from an external provider such as a university, external auditor, or another organization."
Now for my comments. To say that you cannot be impartial and objective and audit your own work is really arrogant. I will agree that not everyone could. I might say that two important factors would be the integrity of the individual and the culture of the company. Both are topics that an auditor would likely be hard pressed to challenge.
This guidance provides possible methods to be used to ensure impartiality and objectivity. It is also common sense.