CSIT blog: SAD - Information System

It is any organized system for the collection, organization, storage and communication of information
The system that accepts data as input process it to generate the information and provides the information to the user as output is Information System
It helps to support devision making co-ordination, control, analysis and visualization in an organization
It is also the study of complementary networks if hardware and software that people and organization use to collect, filter, process, calculate and distribute data

It is the software system or software/ hardware combination that supports transaction processing
it server the most elementary day to day activities of an organization
it supports the operational level of the business that supplies data for higher level management decision
it handles the data about business transaction. Thus transactions are verified, accepted or rejected
The goal of TPS is to improve the transaction processing by speeding it up
Mainly Workers are related to TPS

it provides information on managers in the organization
it focuses on the management of IS to provide efficiency and effectiveness of strategic decision making
It takes the raw data available through TPS and converts them into a meaningful aggregated from that managers need t fulfill their responsibilities
It calls for a good understanding on what kind of Information managers require and how managers can use the information in their jobs
MIS is mainly concerned with Middle level Managers of the organization

It is designed to help organizational decision makers
It supports for the organizational decision making activities
DSS is flexible, adaptable and quick
DSS provides an interactive environment in which decision makers can quickly manipulate data and models of business organizational DSS concentrates of # main component i.e. Databases, models base and user interface
- Database is an organized collection of data
- Model base helps to know about the user requirements
- User Interface helps user to provide their requirements to the system

It is Also known as Executive Information system
It facilitates and support senior executive information and decision making needs
It is the specialized form of DSS
It is intended for top level executive use
It allows summary over the entire organization
It is expensive to run and require extensive staffs to support

It captures and stores the knowledge if human experts and then imitates human reasoning and decision making processing
Expert system are also called AI and helps in decision making
The are composed of two components –
- Knowledge base is the database for knowledge
- Inference engine helps for logical judgements

CSIT blog