Page 34 - DCAP205_DCAP409_ANALYSIS_AND_DESIGN_OF_INFORMATION_SYSTEMS

Analysis & Design of Information Systems

Notes 1.9 Keywords

Decision Support System: System that serves the information needs at management level of an
organization.

Environment of a System: Anything outside a system which has an effect on the way the
system operates.
Executive Support System: System designed to address unstructured decision making at the
strategic level of an organization.
Information System: A people-machine sub-system of the business system that supports the
operational, managerial and decision-making information needs of an organization.
Management Information System: System designed to serve the functions of planning,
controlling and decision-making at the management level of an organization.
Office Automation System: System that serves the knowledge level of an organization for
supporting knowledge workers like production managers, EDP managers, etc.

Project Manager: A computer specialist who monitors the development ad implementation of
software in relation to quality, cost and time.
Sub-system: A part of the system that carries one part of the system function.

System: A Coherent set of interdependent component which exists for some purpose, has
some stability and can be usefully viewed as a whole, generally portrayed in terms of an
input-process-output model existing within a given environment.

System Analysis: Process of gathering and interpreter facts, diagnosing problems and using
the information to recommend improvement to the system.
System Analyst: A computer specialist who translates business problems and requirements
into information system.
System Approach: A set of procedure for solving a particular problem, to optimize the net
results of the operations of an organization.
System Design: The process of planning a new system or replace or complement an existing
system.
System Designer: A computer specialist who creates a detailed physical and logical design of
the system.

System Study: A study of the operations of a set of connected elements and of the
interconnections between these elements.
Transaction Processing System: System designed to serve the operational level of an
organization.

1.10 Review Questions

1. Illustrate the various phases used in information system development.
2. What is the objective of feasibility study? Depict the components of feasibility study.

3. Make distinction between conceptual design and detailed design.
4. Illustrate significant attributes of a system analyst.
5. Which is in your opinion the most difficult job of a systems analyst?

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