This standard describes the principles for the preparation, review, approval and modification of electronic product quality plans. and the main contents of the quality plan. The content described in this standard is an expansion of the corresponding elements in GB/T 19004. usually. The quality plan should be used in conjunction with a quality system that meets the requirements of GB/T 19001, GB/T 19002 or GB/T 19003. This standard is used for the preparation of a quality plan that specifies the requirements for a specific product, project or contract. The quality plan can also be used when there is no quality system. In this case, work procedures should be prepared as supporting documents for the quality plan.