Prof. Awad Hanna Precedence Diagram Advantages of using Precedence Diagram: 1. No dummy activity are required. 2. A single number can be assigned to identify.

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Presentation transcript:

Prof. Awad Hanna Precedence Diagram Advantages of using Precedence Diagram: 1. No dummy activity are required. 2. A single number can be assigned to identify each activity. 3. Analytical solution is simpler.

Prof. Awad Hanna Redundant Linkages 20 A 30 B 30 C 20 A 30 B 40 C (a) Incorrect Representation (b) Correct Representation

Prof. Awad Hanna Closing the network to give Single Beginning and Ending Nodes AD CE B (a) Incorrect Representation AD CE (b) Correct Representation Starting DummyFinish Dummy B

Prof. Awad Hanna Retaining Wall Precedence Diagram Wall 1 Wall 2 Footing 1 Footing 2 10 Footing 1 40 Wall 2 20 Footing 2 30 Wall 1

Prof. Awad Hanna Precedence Diagram - Sequence Stepped and Numbered 10 A 25 E 20 C 30 F 2 5 Start 35 Finish 15 D 31 4

Prof. Awad Hanna Constructing the Precedence Diagram 1.Create Activity list and eliminate redundancies. 2.Construct precedence diagram  Activities with no dependency arranged at the left  Create dummy start if you have more than one start “Contract Award” 3.Arrange activities in a sequential order