Another source to use to identify risks is with complaint analysis. When your product reaches a customer and the product that they receive is not satisfactory, they will file a complaint. For example, it is possible that the product was damaged during transport. When the product is returned to the company, it can be examined and the ways in which it was damaged can be identified. The extent of the damage would be assessed, and you would be able to determine how the product was effected. Then you can try try calculate the risk of it happening again and the risk to the end user if the product was used instead of returned. Finally, you could manage the risk of it happening again by improving the design of the product or the design of the packaging.