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Requirements Engineering (Sources (Documents (CCL), Sponsors, Managers,…

- - - - Workshops
        
        A structured meeting in which a group of appropriately knowledgable and motivated people are moderated by an impartial facilitator to achieve an agreed objective
        
        Advantages
        
        Fast
        
        Stakeholders involved and committed
        
        Developers and stakeholders understand each other
        
        Simple method of resolving issues/options
        
        More creative solutions are produced
        
        Disadvantages
        
        Hard to Schedule
        
        Group dynamics need careful managing
        
        Hidden agendas
        
        Roles
        
        Sponsor
        
        Facilitator
        
        Participants
        
        Scribe
      - Interviews
        
        A structured discussion between the analyst and a stakeholder to elect facts and information about the business situation and their role in it
        
        Advantages
        
        Builds relationship with the stakeholder
        
        Can elect detailed information
        
        Confidential
        
        Disadvantages
        
        Only one view point
        
        May get opinions or solutions, not facts
        
        Time consuming
        
        Used to:
        
        Make initial contact with key stakeholders
        
        Establish a basis for analysis work
        
        Build and develop rapport with stakeholders
        
        acquire information
        
        Investigate and establish
        
        Current functions that must be continued
        
        Current problems that need to be resolved
        
        New functions to be introduced
      - Observation
        
        Watch what people do either by formal agreement or informally by just 'wandering about'
        
        Advantages
        
        We get can get a good understanding of processes, problems, politics etc.
        
        Helps devise workable, acceptable solutions
        
        Disadvantages
        
        Can feel like 'big brother' - unsettles the observed
        
        your presence may impact the process
        
        Formal observation
        
        Watching specified tasks
        
        Staff are prepared
        
        May see only what they want you to see
        
        Informal Observation
        
        No staff preparation
        
        May not see all required tasks being performed
      - Questionaires
        
        Good way to get information from a wide range of viewpoints
        
        Advantages
        
        Can reach a large audience
        
        Can discover commonalities
        
        Can determine attitudes
        
        Disadvantages
        
        People dislike questionnaires
        
        They must be kept small and focussed
        
        It take skill to formulate the questions
      - Scenarios
        
        Telling the story of the task
        
        All steps from business trigger to outcome
        
        Pre-conditions
        
        Must be true for the scenario to begin
        
        Post conditions
        
        Must be true following conclusion
        
        Alternative paths
        
        Exception Situations
        
        Advantages
        
        Aids visualisation and discussion of real life situations
        
        Cam be used to build test scenarios
        
        Disadvantages
        
        Can become complex, especially where many alternative paths exist
      - Prototyping
        
        Create a 'demonstration system' to help clarify vague requirements
        
        Advantages
        
        Helps the user to really determine the requirements
        
        Particularly user interface, performance, and navigation paths
        
        Validates requirements
        
        Reduces risk of 'getting it wrong'
        
        Disadvantages
        
        Can run out of control
        
        Can raise unrealistic expectation
        
        Can lead use to overestimate progress
      - Document analysis
        
        Reviewing and analysing source documentation such as forms, screen layouts, and reports
        
        Advantages
        
        Can yield good information on
        
        Organisation
        
        Process
        
        System
        
        Disadvantages
        
        Don't get differing viewpoints
        
        Dry and Tedious