Re: Major vs Minor Non Conformances - Definition of
No. Theres nothing called "major" or minor". ISO 9001 or ISO 19011 dont define any such things. Sydney has given a reference to what ANAB says. Most of the Accrditation Boards have advised their registrars to stop using these terms. Even if used, both mean "NC".
Either there is an NC or there is no NC. The auditor is advised to exercise extreme prudence while stamping any observation as an NC.
Stated in simple words,
Any observation is marked as an NC only when it indicates a breakdown of the QMS or indication of a possible breakdown in the QMS. Personal errors, one time mistakes dont get an NC if rest of the system is functioning OK. Such things are variously reported as "observations" or "opportunity for improvement" or in similar words.
For most external auditors today, any NC means a reaudit to review closure before a certification is recomended, and a suspension / withdrawal if already certified.
Internally, you are free to define your own parameters and action plans on them. But these tend to become highly subjective, so it is advised to keep it black and white (not that this wont be subjective

). NC or no NC. Severe action if there is an NC, check during next audit if there is no NC.
Your choice.