Best Case: after the detection of faulty components, it is replaced. This means a minimum delay in production.
Acceptable Condition: the identification of the components is done in the last card test card. Components are replaced. And this means delay in production.
A difficult situation: the identification of the faulty card on the device, the components on the card is identified, the component is replaced and the long delays experienced in the production ...
Unacceptable situation: identification of the faulty one in the field. Staff is sent to field to identify. Defective cards and components are identified, the customer's production stops. Reputaion is totally damaged.