While I apologize about making the assumption about your company, you answered your own question. If everyone agrees that the employee appraisals are the method that adresses the evaluation of the actions taken to assure competence, then you would have to show the auditor the evals, not necessarily the detail on the employee but maybe just the section related to competence. If you are using the overall appraisal as evidence of competence, you might have other issues.
Employee apprasials are an ongoing evaluation of how the employee is doing for that period of time, usually beign used to determine wage increases. This does show competence, but do you have a system in place to address (corrective action) when someones rating is lower than the previsous review? The standard requires that you determine the competence required for the job, then take actions to make sure people meet the competence criteria. If you are using the employee appraisal as the only tool to measure competence, then A - it would have to be available for the auditor to review for conformance to the requriements that you established, and B - you would have to have a corrective action system that would address the competence issue directly if evidence showed a decrease in the competence, or even a lack of improvement.
Since this is your situation, I would pose the internal auditor question to you. Has an internal audit ever been done on the competence issue? Did the internal auditor get to review the records? Objective evidence is required, not just hear say. Your system can not say you do something then you as a company take the approach that the auditor is not allowed to verify it based on confidentiality. (Unless there is health realted issues in the employee appraisal form, then confidentiality of the employee is legally required).
Employee ratings on appraisals can go down from time to time based on a lot of different reasons, some may have nothing to do with competence of personnel performing work affecting product quality. This however would still require corrective action based on the measurement of competence being tied to the appraisal.
I am not saying your method is wrong, I do however think there are easier methods to do this without recreating the wheel.
This obviously is a good topic, thanks for bring it up - you have gotten a lot of people interested.
