| At present, in the course of deepening economic restructuring and realizing two essential transformations, the problem of irrational economic structure has noticeably influenced the improvement of national economic quality and its benefit. The irrational economic structure has noticeably behaved on the irrational performance existing in industrial structure, enterprise structure and product structure, while the crux of solving and improving the irrational economic structure is to optimize and adjust the product structure in enterprises.Beginning with fundamental concepts and problems of the product structure, the thesis analyzes and summarizes basic principles of optimizing and adjusting the product structure in enterprises. By using theories of self-organization and heter-organization, the thesis deeply analyzes evolutionary law and evolutionary mechanism of modern enterprise product structure, Author considers that self-Organization mechanism combining heter-organizition mechanism controls the evolution of enterprise's product structure in market economy, and the leading product which directs theevolution is Order parameter. By using relevant theories and models of fuzzy mathematics, the thesis makes a fuzzy synthetic appraising for enterprise product life cycle and competition ability. The thesis establishes principles for choosing key products and leading products in enterprises, and makes out adjustment tactics of enterprise product structure.As the example of one food processing enterprise in Henan province, relying on product character and development trend of food processing industries and according to the enterprise's actual capability at operation, the thesis thoroughly analyzes product structure's performances in enterprise and makes out optimum mix of the enterprise product structure. |