A quality assurance system and method for use between a service provider having
a sequence of process stages and a quality assurance stage, and a control center.
The service provider performs a plurality of processes on goods at the process
stages, transfers engineering data corresponding to the processes to the control
center via Internet, and holds the goods at the quality assurance. The control
center compares the engineering data with a standard specification, and transfers
a confirmation message to the service provider if the engineering data conforms
to the standard specification. The service provider may ship the goods to customers
after the confirmation message is received.