Information Systems Concepts Basic Computer Concepts Information Systems  Information System  a particular discipline or branch of learning that is concerned.

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Presentation transcript:

Information Systems Concepts Basic Computer Concepts Information Systems  Information System  a particular discipline or branch of learning that is concerned with the application of information to organizational needs  Information  “a measure of the quantity of data in a message” (information theory context) “any data that is relevant or has some value” (information systems concept)  Data  “any sign, symbol or measure, which is in a form that can be directly captured by a computer or machine”

Information Systems Concepts Basic Computer Concepts Information Systems   study of information production, flow and use within organizations a combination of hardware, software, people, procedures and data that provides data processing capabilities for a business or organization  Information Technology  the development, installation and implementation of computer systems and applications

Information Systems Concepts Basic Computer Concepts Capabilities of Information Systems  Input  Processing  Output  Feedback

Information Systems Concepts Basic Computer Concepts Manual VS Computer-Based Information Systems  Manual Payroll System  The Payroll Clerk 1. receives time sheets from supervisors 2. retrieves each employee’s record file from the filing cabinet 3. calculates the gross wage manually with a calculator 4. manually calculates all deductions to get the net wage 5. manually types the pay cheque and stub 6. updates the payroll register (stores every detail of wages paid, deductions made, etc) study of information production, flow and use within organizations

Information Systems Concepts Basic Computer Concepts Manual VS Computer-Based Information System  Computer-Based Payroll System  The Payroll Clerk processes the stored time-sheet details retrieves each employee’s record from database file calculates the gross salary calculates deductions prints the pay cheques updates the payroll register

Information Systems Concepts Basic Computer Concepts Function-based VS Integrated Information System  Function-based Integrated System  intended for the exclusive support of a specific application area has its own set of database files, which start out being the same database files easily become different as one is updated but the other ones aren’t  Integrated Information System  share a common set of database files only one database file implies 0% redundancy and 100% data integrity Database Management System software is used as a tool to integrate data and information flow through an organization

Information Systems Concepts Basic Computer Concepts Benefits of Using Integrated Information System  Better control as data redundancy can be eliminated. Allows different departments within the organization to coordinate their activities more efficiently. Greater access to information as everyone on the system has access to the latest up-to-date information. More efficient software development as programmers have to deal with only database file structure for each database file.