1. The Architecture of an Enterprise System

2. objectives  introduce enterprise system architecture  discuss system landscape

3. Logical architecture enterprise structure & environment data end users applications operational data ACCOUNTING SALES & DISTRIBUTION PRODUCTION HR

4. Logical architecture of R/3 R/3 BASIS FI Financial Acctg. COControlling AM Asset Mgmt PS Project System WFWorkflow MM Materials Mgmt HR Human Resources SDSales PP Production Planning QM Quality Mgmt PM Plant Maint. IS Industry Solutions

5. Open systems approach RFC CPI-C OLE EDI ALE TCP/IP

6. Tiered configurations Application Database Presentation Database, application, presentation processes Central systemTwo-tierThree-tier Presentation processes Database, application processes Database processes Application processes Presentation processes

7. Enterprise system scalability Scalability Application Database Presentation

8. Master Data Organizational structure Programs Log files Database server Application servers Database: Contains most objects Data dictionary Transaction Data

9. Application server Application servers: Contain work processes Database server Dispatcher Work Process Work Process Work Process

10. Application servers: Contain work processes Dispatcher Work Process Work Process Work Process Work process can be: Dialog Batch Update Spool Message Gateway Messages Server: Coordinates message exchanges between different application servers Gateway Server: Allows the communication between R2, R3, and external systems

12. System landscape  Attempt to isolate production system from development, testing, and training systems

13. One system landscape PRD Development Development Testing Quality Assurance End User Training Sandbox Production

14. Two system landscape Development Development Testing Quality Assurance End User Training Sandbox DEV Production PRD

15. Three system landscape Production PRD QAS Development Development Testing Quality Assurance End User Training Sandbox DEV Customizing Master

16. Transport management  Version management  Import changes in an orderly manner  Apply changes consistently Development Transport Directory (FIFO Buffer) release apply release apply Test Quality test user training Production

17. summary  introduced enterprise system architecture  discussed system landscape