Information System (CS 507)

Fall 2009

Assignment No. 1

Due Date:

Your assignment must be uploaded/submitted before or on 9^th November 2009.

Max Marks: 20

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Q: Write a note on the following
(Marks 5+5+5+5)

1. Describe the components of Computer-based information systems.
2. Describe various types of information systems by breadth of support.
3. Differentiate between information technology infrastructure and information technology architecture.
4. Identify the major information systems that support each organizational level

_____________________________________________

Answer No.1

Components of Computer-based information systems

Hardware is a device such as a processor, monitor, keyboard or printer
Software is a program or collection of programs that enable hardware to process data.
Database is a collection of related files or tables containing data.
Network is a connecting system (wire line or wireless) that permits different computers to share resources.
Procedures are the set of instructions about how to combine the above components in order to process information and generate the desired output.
People are those individuals who use the hardware and software, interface with it, or uses its output.

Describe various types of information systems by breadth of support.

Answer No.2

Types of information systems by breadth of support

Functional Area Information System

Functional area information systems or departmental information systems
• Function: Support the activities within specific functional areas.
• Example: System for processing payroll.

Transaction Processing System (TPS)
• Function: Process transaction data from business events.
• Example: Walmart checkout point-of-sale terminal.

Enterprise Resource Planning (ERP) System
• Function: Integrate all functional areas of the organization.
• Example: Oracle, SAP

Inter organizational Information System

Inter organizational information systems (IOS) are information systems that connect two or more organizations and support inter organizational operations such as supply chain management.
 Function: Manage flows of products, services and information among organizations.
 Example: Walmart Retail Link System connecting suppliers to Walmart.
 Supply chain describes the flow of materials, information, money and services from raw material suppliers through factories and warehouses to the end customers.

Electronic Commerce Systems

 Function: Enable transactions among organizations and between organizations and customers.
 Business-to-Business (B2B)
 Business-to-Consumer (B2C)
 Example: www.dell.com

Differentiate between information technology infrastructure and information technology architecture.

Answer No.3

Information Technology Architecture. A high-level map or plan of the information assets in an organization which guide current operations and is a blueprint for future directions.
Information Technology Infrastructure. The physical facilities, IT components, IT services and IT management that support an entire organization.

Answer No.4

The six major types of information systems corresponding to each organizational level are:

• Transaction Processing Systems (TPS): serve the operational level of an organization.
• Knowledge work systems (KWS)
• Office automation systems (OAS) to serve the knowledge level of an organization.
• Decision-support systems (DSS)
• Management information systems (MIS) serve the management level of the organization.
• Executive support systems (ESS) serve the strategic level of an organization.

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