INFORMATION SYSTEM DEVELOPMENT INTRODUCTION TO SYSTEM ANALYSIS AND DESIGN
System Development Environment <ul><li>Most of the people in the organization involved in information technology </li></ul...
System Development Environment <ul><li>System  is a collection of related component that interact to perform a task in ord...
System Development Environment <ul><li>System analysis and design  is a procedure to solve problem which is consist of 6 p...
Personnel's in system development <ul><li>A committee should be formed to develop the system. The participant in the proje...
<ul><ul><li>management task : planning , organizing, staffing, supervising and controlling the organization’s progress  </...
Types of information system <ul><li>Expert system (ES) </li></ul><ul><ul><li>A set of interactive computer programs that h...
<ul><ul><li>Created on the basic of knowledge collected on specific topics from human experts and they imitate the reasoni...
<ul><li>Transaction processing system (TPS) </li></ul><ul><ul><ul><li>computer-based information that keeps track of the t...
<ul><li>Management Information System (MIS) </li></ul><ul><ul><li>Computer based information system that uses data recorde...
<ul><li>4.  Decision Support System (DSS) </li></ul><ul><ul><li>computer based information  system that provides a flexibl...
Analytic Models <ul><li>The models uses a DSS database </li></ul><ul><li>The system is accessed through DSS software </li>...
 
Information System Development <ul><li>System development methodologies </li></ul><ul><ul><li>Waterfall models </li></ul><...
Information System Development <ul><ul><li>Evolution models </li></ul></ul><ul><ul><ul><li>Slow </li></ul></ul></ul><ul><u...
System Development Life Cycle Preliminary  Investigation System  Maintenance  System  Development System Design System Ana...
Main phases in system development Preliminary Investigation Conduct preliminary  analysis Purpose alternative solution Des...
System Analysis Gather data Analyze the data Make a written report
System Design Make a preliminary design and then a  detail design Write a report
System Development Acquire  the hardware and software and test the system
System Implementation  Convert the hardware, software and files to the new system Train the users
System Maintenance Audit the system Evaluate it periodically
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E:\Computing\Topic2\Chapter1

  1. 1. INFORMATION SYSTEM DEVELOPMENT INTRODUCTION TO SYSTEM ANALYSIS AND DESIGN
  2. 2. System Development Environment <ul><li>Most of the people in the organization involved in information technology </li></ul><ul><li>If a organization produce a system and user make use of it then more afford should be put into it to make it successful </li></ul><ul><li>To develop a new system, planning is a important aspect to avoid failure. The planning must be widespread </li></ul>
  3. 3. System Development Environment <ul><li>System is a collection of related component that interact to perform a task in order to accomplish a goal </li></ul><ul><li>System is a collection of men, machine and methods organized to accomplish a set of specific function </li></ul><ul><li>There are many types of system that can be used to organize an organization such as manual working system, computerized systems, systems analysis and design and system analysts </li></ul>
  4. 4. System Development Environment <ul><li>System analysis and design is a procedure to solve problem which is consist of 6 phases to examine and fix the information system </li></ul><ul><li>Information system is a group of hardware, software, people, procedure and data </li></ul><ul><li>These two elements joint together to produce basic information to organize an organization </li></ul>
  5. 5. Personnel's in system development <ul><li>A committee should be formed to develop the system. The participant in the project are of three types </li></ul><ul><ul><li>i) User : the system under discussion should always be developed in consultation with user </li></ul></ul><ul><ul><li>ii) Management : such as information system managers who will make tactical decision about unstructured, unexpected and nonrecurring problems </li></ul></ul>
  6. 6. <ul><ul><li>management task : planning , organizing, staffing, supervising and controlling the organization’s progress </li></ul></ul><ul><ul><li>iii) Technical staff : members of company’s information system department, consisting of system analysts and programmers and they are responsible to carry out and execute the project </li></ul></ul>
  7. 7. Types of information system <ul><li>Expert system (ES) </li></ul><ul><ul><li>A set of interactive computer programs that helps users solve problem that would otherwise require the assistance of a human expert </li></ul></ul><ul><ul><li>Used by both management and non management personnel to solve specific problem such as how to reduce production cost, improve workers’ productivity or reduce environmental impact </li></ul></ul>
  8. 8. <ul><ul><li>Created on the basic of knowledge collected on specific topics from human experts and they imitate the reasoning process of human being </li></ul></ul><ul><ul><li>Run in large computers – require large memory. E.g. Negotiator Pro for IBM and Macintosh computer </li></ul></ul>
  9. 9. <ul><li>Transaction processing system (TPS) </li></ul><ul><ul><ul><li>computer-based information that keeps track of the transactions needs to conduct business </li></ul></ul></ul><ul><ul><ul><li>Transaction is a recoded event having to do with routine business activities </li></ul></ul></ul><ul><ul><ul><li>Some features </li></ul></ul></ul><ul><ul><ul><ul><li>Input to the system are transaction data : bills, orders, inventory levels. Output consists of processed transactions bills, paychecks </li></ul></ul></ul></ul><ul><ul><ul><ul><li>For lower managers – TPS deals with day-to-day matters, helps to make operational decisions </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Produces details reports – manager receive the report </li></ul></ul></ul></ul>
  10. 10. <ul><li>Management Information System (MIS) </li></ul><ul><ul><li>Computer based information system that uses data recorded by TPS as input into programs that produce routine reports as output </li></ul></ul><ul><ul><li>Some features </li></ul></ul><ul><ul><ul><li>Input : processed transaction data such as bills, orders and paychecks </li></ul></ul></ul><ul><ul><ul><li>output : summarized, structured reports – budget summaries, production schedules </li></ul></ul></ul><ul><ul><ul><li>Assist middle managers </li></ul></ul></ul><ul><ul><ul><li>Draw from all departments </li></ul></ul></ul><ul><ul><ul><li>Produces several kinds reports </li></ul></ul></ul>
  11. 11. <ul><li>4. Decision Support System (DSS) </li></ul><ul><ul><li>computer based information system that provides a flexible tool for analysis and helps managers focus on the futures </li></ul></ul><ul><ul><li>The organization must have established a transaction processing system and a management information system </li></ul></ul><ul><ul><li>Some features </li></ul></ul><ul><ul><ul><li>input : some processed transaction data </li></ul></ul></ul><ul><ul><ul><ul><li>Output : are flexible – on demand reports </li></ul></ul></ul></ul><ul><ul><ul><li>To assist top managers </li></ul></ul></ul><ul><ul><ul><li>Produces analytic models </li></ul></ul></ul>
  12. 12. Analytic Models <ul><li>The models uses a DSS database </li></ul><ul><li>The system is accessed through DSS software </li></ul><ul><li>The model allows the managers to do a simulation </li></ul>
  13. 14. Information System Development <ul><li>System development methodologies </li></ul><ul><ul><li>Waterfall models </li></ul></ul><ul><ul><ul><li>From the big idea of the system, then it is braked into small problem/task. Each task will be solved and finally the system will be developed </li></ul></ul></ul><ul><ul><li>Rapid application development models </li></ul></ul><ul><ul><ul><li>Faster </li></ul></ul></ul><ul><ul><ul><li>Uses the most simple way to produce the result </li></ul></ul></ul><ul><ul><ul><li>E.g. calculator (electronic calculation machine) </li></ul></ul></ul>
  14. 15. Information System Development <ul><ul><li>Evolution models </li></ul></ul><ul><ul><ul><li>Slow </li></ul></ul></ul><ul><ul><ul><li>Needs to pass through a few steps/processes to get a result </li></ul></ul></ul><ul><ul><ul><li>E.g. students’ co-curriculum marks system – developed using more than one software </li></ul></ul></ul>
  15. 16. System Development Life Cycle Preliminary Investigation System Maintenance System Development System Design System Analysis System Implementation
  16. 17. Main phases in system development Preliminary Investigation Conduct preliminary analysis Purpose alternative solution Describe cost & benefits of each solution Submit a preliminary plan with recommendations
  17. 18. System Analysis Gather data Analyze the data Make a written report
  18. 19. System Design Make a preliminary design and then a detail design Write a report
  19. 20. System Development Acquire the hardware and software and test the system
  20. 21. System Implementation Convert the hardware, software and files to the new system Train the users
  21. 22. System Maintenance Audit the system Evaluate it periodically

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