Question
Download Solution PDFA dummy activity
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Dummy Activity
A dummy activity is an artificial activity in network diagrams used to maintain logical relationships without consuming resources or time. It helps in representing dependencies between tasks. Let's analyze the given options:
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"Has no tail event but only a head event." (Incorrect)
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A dummy activity is represented as a dashed arrow connecting two events in a network diagram. It must have both a tail event (starting point) and a head event (ending point).
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Thus, the statement is incorrect as it contradicts the basic definition of a dummy activity.
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"Has only a head event but no tail event." (Incorrect)
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Similar to the previous option, a dummy activity must have both a head and a tail event. It cannot exist with only a head event.
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Therefore, this statement is also incorrect.
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"Does not require any resources nor any time." (Correct)
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A dummy activity is used purely for logical representation and does not consume resources (e.g., manpower, materials) or time.
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This makes it a unique component of network diagrams, distinguishing it from real activities.
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Hence, this statement correctly defines a dummy activity.
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"Has no sequence and can be fitted anywhere." (Incorrect)
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Dummy activities are used to maintain the logical sequence of tasks in a network diagram. They cannot be arbitrarily placed or fitted anywhere.
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Therefore, this statement is incorrect as it misrepresents the function of dummy activities.
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Conclusion: Option 3 is the correct answer as it accurately describes the key characteristic of a dummy activity.
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