ليلة الميد في SYSTEM ANALSYS PDF

CH.1 1. An information system is a conceptual system that enables managers to control and monitor a firm’s physical systems used to transform input resources into output resources 2. Some Ideas About Information Systems A system is a set of interrelated elements A purposive sys...

CH.1 1. An information system is a conceptual system that enables managers to control and monitor a firm’s physical systems used to transform input resources into output resources 2. Some Ideas About Information Systems A system is a set of interrelated elements A purposive system is a system that seeks a set of related goals An open system is a system that interacts with an environment (e.g. a user types a command, and the computer responds with a display of data) An information system is open, purposive system that produces information using input / process / output cycle 3. Components of an Information System Components of an Information System –People, procedures, and data People follow procedures to manipulate data to produce information Components of a Computer-Based Information System (CBIS) –People, procedures, data, programs, and computers Programs are instructions for the computers just as procedures are instructions for people  4. The role of computer in information production Serve as a data storage and retrieval device Provide processing capabilities for the production of information (e.g. calculation of totals, averages, ….) Serve as a communication device to obtain data or information from other computers Present information by producing tables, reports, charts, graphs, and formatted documents. 5. Management Information Systems Management information systems (MIS) transform the data in frontline systems, such as transaction processing systems into information useful to managers Typical MIS modules are report-writing software, and models that can simulate firm operations Information from the MIS is then used by organizational problem solvers as an aid in decision-making, as illustrated in the next figure Firms can also interact with suppliers or others to form inter organizational information systems (IOS), in which the MIS supplies information to the other members of the IOS as well as the firm's users 6. A Decision Support Systems (DSS) is a system used to assist managers in making decisions to help solve a specific problem.  CH.2 7. Information Systems Analysis and Design Complex organizational process. Used to develop and maintain computer-based information systems. Used by a team of business and systems professionals. 8. A Modern Approach to Systems Analysis and Design. Application Software: Computer software designed to support organizational functions or processes. Systems Analyst: Organizational role most responsible for analysis and design of information systems. 9. Using established methodologies, techniques, and tools: Ensures the quality and suitability of the system. Provides structure to the development process by applying tested and refined approaches.  10. Quick, easy approaches to building systems: May be faster and cheaper initially, but often lead to suboptimal systems needing more maintenance. Poorly developed systems require more time and money to correct over time. An engineering-based approach ensures structured and systematic systems analysis and design. 11. System Development Methodology: A standard organizational process for analyzing, designing, implementing, and maintaining information systems. 12. Systems Development Life Cycle (SDLC): A traditional methodology for developing, maintaining, and replacing information systems. Phases include: Planning Analysis Design Implementation Maintenance 13. Systems Development Life Cycle (SDLC) Phases: Planning: Identifying, analyzing, prioritizing, and organizing the organization’s information system needs. Analysis: Studying and structuring system requirements.  Design: Converts the recommended solution into logical specifications, followed by physical system specifications. I. Logical Design: Describes system functions without regard to technology. II. Physical Design: Translates logical specifications into technical details for programming and construction. Implementation: Coding, testing, installing, and supporting the information system. Maintenance: Systematically repairing and enhancing the information system.  14. What is prototyping? Prototyping: A repetitive development process. Turns system requirements into a working model. The model is regularly updated. Involves close collaboration between the analyst and users. 15. Computer-Aided Software Engineering (CASE) Tools: Diagramming Tools: Graphical representation of systems. Display/Report Generators : prototype how systems -look and feel- Analysis Tools: Check consistency in diagrams, forms, and reports. Central Repository: Stores project data and specifications. Documentation Generators: Standardize technical and user documentation. Code Generators: Automatically generate code from designs.  CH.3 16. Managing the Information Systems Project (Items): A. Project Manager B. Project C. Deliverable D. System Service Request (SSR) E. Project Management F. Project Management Process A. Project Manager: A systems analyst with diverse skills (management, leadership, technical, conflict resolution, customer relations), responsible for initiating, planning, executing, and closing the project. B. Project: A planned effort with related activities aimed at achieving an objective, having a defined beginning and end. C. Deliverable: The final product of an SDLC phase. D. System Service Request (SSR): A standard form for requesting or proposing systems development work within an organization, including: Contact person Problem statement Service request statement Liaison contact information E. Project Management: A controlled process involving initiating, planning, executing, and closing a project. F. Project Management Process: Initiating the Process Planning the Project Executing the Project Closing the Project  17. Initiating a Project Project Initiation :The first phase of project management where activities are performed to assess the size, scope, and complexity of the project establish procedures for later project activities. 18. Project initiation activities 1. Initiation Team: Organize a core team to assist in initiation. 2. Customer Relationship: Build understanding and trust with the customer, assigning a liaison to work between teams. 3. Project Initiation Plan: Define activities to organize the team, set goals, and establish communication and deadlines. 4. Management Procedures: Develop communication and reporting processes. 5. Project Management Environment: Organize tools for managing the project. 6. Project Workbook: A repository for all project documents and standards. 7. Project Charter: A short document that announces the project, its objectives, assumptions, and stakeholders. ‫‪ Project Workbook‬‬ ‫قلــــوبنا دايــــمـا مــــع إخــــواتنا‬ ‫وخليــــك فــــاكر دايــــما إنــــك تدعيلــــهم ‪ ،‬متوقفــــش تكتــــب وتعــّــرف‬ ‫اللــــي ميعــــرفش ‪ ،‬هــــون علــــى نفســــك واللــــي حواليــــك ألن‬ ‫بدها طولة نفس ‪..‬خلي المعنويات عالية‬