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SYSTEM DESIGN, i. Understand the Business, ii. Maximize Graphical…

- - - - the user interface mainly consisted of process-control screens that allowed the user to send commands to the system.
      - approach worked well with traditional systems that simply transformed input data into structured output
    - - Requires an understanding of human-computer interaction and user-centered design principles
    - - describes the relationship between computers and people who use them to perform their jobs
      - started in the 1980s with users typing complex commands in green text on a black screen.
      - Then came the graphical user interface (GUI), which was a huge improvement, because it used icons, graphical objects, and pointing devices.
      - Industry leaders Microsoft and IBM both devote considerable resources to user interface research.
      - IBM believes that the user interface evolution will lead to computers that truly are consumer products that are simple and natural for the general population to use.
- - - - data entry is performed on a specified time schedule [ daily, weekly, monthly, or longer ]
    - - batch input - used in specific situations
      - but most business activity requires online data entry
      - Advantages:
        immediate validation
        availability of data
      - popular online input method = source data automation
      - Source data automation is fast and accurate, and minimizes human involvement in the translation process.
  - - - Sequence check
      - Existence check
      - Data type check
      - Range check
      - Reasonableness check
      - Validity check
      - Combination check
      - Batch controls
  - - - Email
      - Blogs
      - Instant messaging
  - - - Output security protects privacy rights and shields the organization’s proprietary data from theft or unauthorized access.
    - - Input control includes the necessary measures to ensure that input data is correct, complete, and secure.
      - Every piece of information should be traceable back to the input data
      - Data security policies and procedures protect data from loss or damage, which is a vital goal in every organization.