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System and Information Quality

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System & Info Quality

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System and Information Quality

  1. 1. Information & Information Quality Introduction to Systems DSS as an IS Information Systems (IS) Chapter 3
  2. 2. Introduction to Systems Information & Information Quality DSS as an IS Information Systems (IS) Chapter 3 System? groupa of interacting components with a purpose
  3. 3. Information & Information Quality DSS as an IS Information Systems (IS) Chapter 3 Introduction to Systems systems that has something crosses its boundary in either direction. systems that has nothing crosses its boundary in either direction. Each system has a boundary - separates the components of that systems (which are inside it) from its environment.
  4. 4. Information & Information Quality DSS as an IS Information Systems (IS) Chapter 3 Introduction to Systems Systems always incorporate feedback : output from a systems component that becomes input to a systems component. Systems that do not use feedback to adjust their outputs Systems that use feedback to adjust their outputs, based on how well the result of those output matches the desired result.
  5. 5. Information & Information Quality DSS as an IS Chapter 3 Introduction to Systems Information Systems (IS) Information Systems (IS) is a system whose purpose is to In 1990’s we often associate IS with computer, however, an IS need not use computers. store process communicate
  6. 6. Information & Information Quality Information Systems (IS) Chapter 3 Introduction to Systems DSS as an IS uses one or more data stores (database or set of files) that provide information to support the decision. does not update the databases that it uses as external information sources. communicates with the decision maker. decision maker supplies specific information defining the decision to be made within the general category of decisions with which th DSS can help - tells the DSS what data to extract.
  7. 7. Information & Information Quality Information Systems (IS) Chapter 3 Introduction to Systems DSS as an IS Data Retrieval Modeling Data Analysis Database Decision maker Data for analysis Model input Model results Commands Results Answer Queries Commands Extracted Data
  8. 8. DSS as an IS Information Systems (IS) Chapter 3 Introduction to Systems Information & Information Quality Raw facts Processed data comparing one data element with another performing calculations on data.
  9. 9. DSS as an IS Information Systems (IS) Chapter 3 Introduction to Systems Information & Information Quality degree of excellence in the context of the intended use. Quality of Information : the value of that information for its intended purpose Factors Relevance Correctness Accuracy Precision Completeness Timeliness Usability Accessibility Consistency Conformity to expectation Cost

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