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This study aims to organically integrate the concept and method of six sigma improvement with the characteristic and experience of aerospace quality improvement, and to develop the conception, main idea, framework of aerospace six sigma improvement suit for the characteristic of aerospace and the method of project identification,improvement and evaluation. Aerospace six sigma improvement is a localization development of six sigma improvement method in aerospace.

This paper studies the definition of product quality surveillance in a digital design environment, analyzes the characteristics and new requirements of quality surveillance, and proposes the main contents of quality surveillance in these aspects, including digital design process in the aspects of quality information management, quality problem handling, digital prototype management, technical status management, data exchange and conversion. Finally,we put forward the methods of quality surveillance in digital design process.