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Chapter 7 (Implementation (Direct (new system introduced immediate…

- - - - advantages
        
        less likelihood of a malfunction since the new system has been fully tested
        
        Cost are reduced (only one)
      - disadvantages
        
        staff have to be trained fully
        
        disastrous if the new system fail
  - - - advantages
        
        gradually train staff
        
        old system is still available as a backup
      - disadvantages
        
        more time-consuming than direct
        
        more expensive than direct
  - - - disadvantages
        
        takes longer to implement the new system all across the company
        
        department taking part in this can lose data if the system fail
      - advantages
        
        if they fail, only one affected
        
        train staff in one area, faster and cost less than parallel
  - - - advantages
        
        ensure the system work properly before expanding
        
        failure is not disastrous
      - disadvantages
        
        time-consuming because need to fully evaluate before making any further changes
        
        more expensive than direct
- - - - double entry
        
        data is entered twice and the compared
      - Visual check
        
        compared the entered data with the original document
  - - - Presence check
        
        checks if data is present
      - Range check
        
        checks whether data is in a given range
- - - - advantages
        
        easier to extend question
        
        possible to ask a specific question
      - disadvantages
        
        time-consuming
        
        interviewee can't remain anonymous
    - - advantages
        
        reliable data
        
        cheap method
      - disadvantages
        
        people are feel uncomfortable when being watched
        
        they may not do contravene standard procedure while being watched (false impression)
    - - advantages
        
        answered quickly
        
        cheap
      - disadvantages
        
        no immediate way to clarify incomplete questions
        
        number of returns are low
    - - advantages
        
        allow information to be obtained that is not possible in other methods
        
        analyst can see how the paper system operates
      - disadvantages
        
        time-consuming
        
        expensive