No one can measure the loss of business that may arise from a defective item that goes out to a customer.
The greatest losses are unknown and unknowable.
Foremost is the principle that the purpose of consumer research is to understand the customer's needs and wishes, and thus design product and service that will provide better living for him in the future. A second principle is that no one can guess the future loss of business from a dissatisfied customer.
Shrink, shrink variation, to reduce the loss.