Introduction
	Information systems have become key to the effectiveness and success of organizations.
	Knowing how to acquire,use,and manage information systems to satisfy your own and your firm's requirements is a key to your effectiveness.

Business
	A business is a formal organization that makes products or provide a services in order to make a profit.

Information System

	An Information system is an organized set of components for collecting,transmitting,storing,and processing data 
in order to deliver informations for action.In business firms and other organizations,this information is necessary for
both operations and management.

Components of a Business
Basic Business functions
 4 basic business functions:
	-manufacturing and production,sales and marketing,finance and accounting,and HR.
 5 business entities:
	-suppliers,customers,employees,invoices/payments,and products and services

The Business Environment
-Global environment factors
	Techonology and science
	Economy
	Politics
	Internation change
	
-Immediate environment factors
	Customers
	Suppliers
	Competitors
	Regulations
	Stockholders

Level of Business System
-Operational level system.(day to day activities and transactions)
-Knowledge level system.(knowledge and data workers)
-Management level system.(administrative activities)
-strateigc level system.(long range planning activities)

Generally,an organization in charge of developing information processing systems is called the system development organization or something similar,and system engineers(SEs)and programmers belong there.On the other hand,an organizaiton using developed systems is called the user organization.

A.Development Methodologies
Relationships between enterprise systems,information technology,and major system development methods are also described.

Role of System Development Organization
Enterprise Activities and Information Systems

Various efforts are required for continous growth of an enterprise.Effective use of information technology(IT) is vital.
For enterprises,there are two types of information:

-Internal Information	:Information that is generated through business activities,and includes various slip,forms and management documents that are used in sales,production ordering and accounting.
-Enternal information	:Information generated depending on the economic situations surrounding corporations,including sales of product,trends in the industries concerned,moves of competing compaines,and	transactions with related companies.

Enterprises effectively use these pieces of information in their daily activities,with information systems as the means.

Information systems are classified into the following two categories:

-The operational processing system :Used to support daily operation and to provide business management data.Periodical information processing is conducted for increasing productivity,and improving operation efficiency.
Production planning,Sales support,Receiving and placing orders,Inventory management,Personnel management,Payroll are include.

-The strategic information system :To achieve various business objectives,it is important to use the resources available,humans,materials, and money,in the most effecitve way.The system provides information required to manage these resources.The system is mainly used to genetate reports from management viewpoint.
Strategic decision-making,Market analysis,Sales analysis,Budget and cost management are include.

The objectives of each system are as follows.
The operational processing system
-Reduction in manpower for operations concerned
-Reduction of business processing
-Reduction of delivery time
-Reduction of inventory
-Realization of paper-less operations

The strategic information system
-Increase in sales
-Improvement of sales efficiency
-Improvement of customer satisfaction
-Creation of new markets

Components of information systems
-Hardware
-Software
-Databases
-Telecommunications(LAN,WAN)
-Human Resources(end users)
-Procedures(user manuals,operator manuals,etc)

The Role of Information Systems in Business
Business System
-Manufacturing and Production System
-Sale and Marketing System
-Finance and Accounting System
-Human Resource System

Information System
-Office Information System
-Transaction Processing System
-Decision Support System
-Executive Information System
-Professional Support System
-Management Reporting System

Possible business results from information systems
-Enhanced competitive position(increased market share or profits).
-Increased productivity(lower costs per unit of output).
-Improved quality of products or services leading to higher customer satisfaction.
-Improved decision-making ability.
-Ability to respond faster to the demands of ther marketplace.
-Enhanced ability to communicate and collaborate within the firm and with customer  & suppliers.
-Enhanced goodwill of employees.

-Today's organizations can't be operated or managed effectively without information systems that are built using
 a range of information technologies.
-The result of this is that your performance as a manager,a professional
 will depend on your information systems literacy-on your ability to exploit the capabilities of information systems
 to achieve business results.