ERP system of Virtual University consists of three subsystems “VIS”, “LMS” and “

Question

ERP system of Virtual University consists of three subsystems “VIS”, “LMS” and “EXAMS”, all deployed on same web server and sharing a central database (installed on the same web server).

However due to the increased number of students, VU decides to deploy these sub systems on separate web servers named VIS-Server, LMS-Server and EXAMS-Server, still all sharing a central database.

However this time the database will be installed and managed by a separate database server which will be implemented through oracle server.

Now the clients (students and instructors) can connect and request the services from these servers under following protocols:

1) Students can connect only to LMS-Server and can request services from it.

2) Instructors can connect with all three servers (i.e. LMS-Server, VIS-Server, and EXAMS-Server) and can request the desired service.

3) These servers can also connect with each other to get services as when required.

4) No client i.e. neither the students nor the instructors can directly connect with database server.


Question:

Keeping in mind the Krutchen’s 4+1 architectural view model, draw a diagram to represent the deployment view (also called physical view) of the above system.

Also explain the diagram with in four to five lines.


Note:

1. Carefully study the 4+1 architectural view model before attempting the assignment.

2. You can use any set of notations to draw the diagram.

3. Explanation should not exceed more than 5 lines.

Explanation / Answer

Direct integration—ERP systems connectivity (communications to plant floor equipment) as part of their product offering. This requires the vendors to offer specific support for the plant floor equipment that their customers operate. ERP vendors must be expert in their own products, and connectivity to other vendor products, including competitors. Database integration—ERP systems connect to plant floor data sources through staging tables in a database. Plant floor systems deposit the necessary information into the database. The ERP system reads the information in the table. The benefit of staging is that ERP vendors do not need to master the complexities of equipment integration. Connectivity becomes the responsibility of the systems integrator. Enterprise appliance transaction modules (EATM)—These devices communicate directly with plant floor equipment and with the ERP system via methods supported by the ERP system. EATM can employ a staging table, Web Services, or system–specific program interfaces (APIs). The benefit of an EATM is that it offers an off–the–shelf solution. Custom–integration solutions—Many system integrators offer custom solutions. These systems tend to have the highest level of initial integration cost, and can have a higher long term maintenance and reliability costs. Long term costs can be minimized through careful system testing and thorough documentation. Custom–integrated solutions typically run on workstation or server class computers.

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