The customer is everything to the manufacturer. Therefore, the customer needs is a priority for primary production for the manufacturer and customer satisfaction is achieving the desired quality. These products are designed in accordance with the wishes of customers through a market research, and produced in ways good and right so that the resulting product meets the design specifications, and ultimately provide after-sales service to customers. In a modern quality system, the practice of every department in optimizing operational activities without concern for the needs of other departments within the company can not be accepted or not justified. In a modern quality system, each person must use the concept of systems thinking seriously and really pay attention to enactment of the principle of customer-supplier relationship.