Appraisal audits, specs to reality. Consumer has not yet seen. It always there, always continuous improvement opportunities. External failures are typically disastrous recall costs. Major risk would be millions of dollars over a long period of time.
Soft term lose customers.
Internal rework is costly but not as costly as external failures. Normally, as you spend more dollars in prevention, failure costs will decline. However, over a period of time, you are spending more and getting less. Need training, research and development and pilots in order to prevent failures.