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SDLC (Analysis (Methods of research (Questionnaires (Distributing…

- - - - Distributing questionnaires to the workforce to find out how key tasks are carried out
        
        Advantage: can be answered quickly Disadvantage:questions are rather inflexible
    - - A 1 to 1 question and answer situation between the analyst and the employee/customer.
        
        Advantage: Can modify questions Disadvantage: Time consuming
    - - Involves watching personnel using the existing system to find out exactly how it works
        
        Advantage: Relatively inexpensive method Disadvantage: people get uncomfortable when being watched
    - - Allows the analyst to see how the paper files are kept.
        
        Advantage: allows information to be obtained that could not be found with other methods. Disadvantage: relatively expensive
- - - - this data at the limits of acceptability
    - - this is data outside the limits
    - - this is data that is acceptable and has an expected outcome
- - - - Old and new systems are run side by side for a time before the new system takes over altogether
        
        possible to gradually train staff
    - - with these method, the old system is stopped overnight and the new system introduced immediately
        
        this method can be disastrous if the new system fails since the old system is no longer available