Abstract

This paper discusses characteristics and merits of three-tiered architecture in the system application, points out the core idea of three-tiered architecture is the distribution of calculation and data. This Paper put forward a basic principle that the middle tier should be a buffer of other tiers and the balance point of all loads, and it should be expanded for future business requirements. Based on this principle, we propose a new perspective that the middle tier in traditional three-tiered architecture should be logically divided into Basic Business Tier, Kernel Business Tier and Business Presentation Tier. Finally, the realization of this division is introduced with the example of the doctor's advice management in Hospital Management Information System.

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