30-11-2012, 12:17 PM
ICT – NVQ Level 5 System Analysis & Design
System Analysis.pptx (Size: 327.69 KB / Downloads: 28)
Data, Information, and Systems
What Is a System?
System: A set of components that work together to achieve a common goal
Subsystem: One part of a system where the products of more than one system are combined to reach an ultimate goal
Closed system: Stand-alone system that has no contact with other systems
Open system: System that interfaces with other systems
The Four Stages of Data Processing
Input: Data is collected and entered into computer.
Data processing: Data is manipulated into information using mathematical, statistical, and other tools.
Output: Information is displayed or presented.
Storage: Data and information are maintained for later use.
Types of Information Systems
Office automation systems
Transaction processing systems
Management Information Systems
Decision support systems
Expert Systems
What is Office Automation System?
Office Automation System (OAS) is a collection of varied computer machinery and software use to collects, processes, stores & transmits data. The Information in the form of electronic office communication.
OAS could also be considered as computer based information system. It can collects, process, store & transmit electronic message.
Advantages of the OAS
Better utilization of human resources
Improved quality of work
Efficient decision
Better service for customers
Increased organizational effectiveness
Automate office procedures
Improve office communication and productivity
Transaction Processing Systems
TPS is collect, store, Modify & retrieve the transaction of an organization.
The primary purpose of transaction processing system is to record, process, validate & store transactions had take place in the various functional areas of a business for future Retrieval & use.
Decision support systems
This is a system which is interact with computer base system or sub system. These system is help to make decision to identify Data, Document, Technologies problems and solve them and also some kinds of application which enhance a person or groups ability to make decision.
These systems assist higher management to make long term decisions.