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    hi can someone please tell me what it means when it asks you to show why something is redundant (linear programming)

    and in drawing networks, how am i suppose to know when to draw a dummy activity.

    thanks
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    When you have two activities coming out of one node, but one of the activities depends on more than one previous activity really,
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    OR when you have 2 activities going from and to the same events.
    i.e. if activity C and D are both going from A to B.
    As in this summers D1 exam
 
 
 
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Updated: June 19, 2005
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