When I worked on PC hardware at IBM we operated on the rule that the cost of fixing a problem is 1x development, 10x in testing and 100x once sold to customers.

When I worked on PC hardware at IBM we operated on the rule that the cost of fixing a problem is 1x development, 10x in testing and 100x once sold to customers. Alas, that was before IBM's PC division was bought by Lenovo...