Quality audits are systematic and independent examinations of your quality management system, processes, and outcomes to verify their conformity to specified requirements, standards, and best practices. Quality audits can help you identify gaps, risks, and opportunities for improvement, as well as provide feedback and recommendations for corrective and preventive actions. Quality costs are the costs associated with achieving, maintaining, and improving quality. Quality costs can be classified into four categories: prevention costs, appraisal costs, internal failure costs, and external failure costs. Prevention costs are the costs of preventing defects and errors from occurring, such as training, planning, and quality control. Appraisal costs are the costs of measuring and evaluating quality, such as inspections, testing, and audits. Internal failure costs are the costs of correcting defects and errors before they reach the customer, such as rework, scrap, and waste. External failure costs are the costs of dealing with defects and errors after they reach the customer, such as complaints, returns, warranties, and lawsuits.