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Chapter 1 • Introduction to Enterprise Systems for Management  13



                                                Hardware



                                            DATA (Database)

                                    Core Business Logic (Security/Access)

                                       Functional Business Applications  MARKETING  PRODUCTION


                                                        HRM
                                                  FINANCE

                             ACCOUNTING
                                           DISTRIBUTION
                                    SUPPLY CHAIN
                                      Client User Interface Applications
                                              End Users
                           FIGURE 1-6 Logical Architecture of an ERP System




                                                Clients

                Presentation
                Logic Tier


                                Remote user clients, Integration servers, Load Balancing Web
                                Servers, CITRIX Server Farm





                Business
                Logic Tier





                                Load Balancing, Application Servers, Batch Server, Print Servers


                Data Tier
                                    Production       Reporting          Disk DB
                                    DB Server        DB Server           Server

                FIGURE 1-7 Tiered Architecture Example of ERP System
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