How does design of experiment work in quality management and what are its benefits?

We need database then you can study quality for your service or product >>> then take sample for study of quality >> A quality management system is a means of implementing such controls. One of its main purposes is to bring customer and supplier together at defined stages of the product life cycle, thereby reducing the risk of problems occurring and improving the effectiveness of the product. Thus, the customer has a key role to play in the achievement of quality.