Which of the following is primarily an output of a quality appraisal system?

The primary output of a quality appraisal system is quality audit results. Quality appraisal systems are designed to evaluate and ensure that products and processes meet established quality standards. One of the key functions of these systems is to conduct audits, which systematically review and assess compliance with quality requirements. The results of these audits provide critical insights into areas of conformance and non-conformance, thereby guiding improvements and corrective actions necessary to enhance overall quality.

The other options offer important information but do not directly reflect the output of a quality appraisal system. For instance, defect rates of supplied products relate more to the quality of incoming materials rather than the appraisal system itself. Metrics for process efficiency evaluate how effectively resources are utilized in processes but do not capture quality appraisal outputs. Customer satisfaction scores measure the end user's perception of product/service quality but stem from broader quality management practices, not exclusively from appraisal activities.