Three-Tier Architecture

Three-Tier Architecture

• Most current ERP implementations follow a three-tiered architecture consisting of:
  • Web tier
  • Application tier
  • Data tier

Web Tier

• Includes the server that clients interact with for application access.
  • GUI, inputting data, requesting information, presenting data.
  • Consider the number of users during peak hours and the type of data transmitted.
  • Implement security measures: firewall, policy, access restriction, and intrusion detection service.

Application Tier

• Provides the components to apply business logic of the functional modules.
  • Acts as an intermediary between client applications and the database.
  • Contains reusable objects of business process rules.
  • Most processing occurs here.
  • Requires stringent security measures.

Data Tier

• Responsible for data management.
  • Central repository of data.
  • Includes SQL manager.
  • Scalability for future data needs should be anticipated.
  • Requires stringent security measures.