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| Negative Float
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Negative float indicates activities must start before their predecessors finish in order to meet a Target Finish date. All float is calculated when a project has its schedule computed. Negative float occurs when the difference between the late dates and the early dates (start or finish) of an activity are negative. In this situation, the late dates are earlier than the early dates. This can happen when constraints (Activity Target dates or a Project Target Finish date) are added to a project.
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| Network Analysis
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Network analysis is the process of identifying early and late start and finish dates for project activities. This is done with a forward and backward pass through the project. Many PM software tools will check for loops in the network and issue an error message if one is found. The error message will identify the loop and all activities within it.
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| Network Diagram
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A graphic tool for depicting the sequence and relationships between tasks in a project. PERT Diagram, Critical Path Diagram, Arrow Diagram, Precedence Diagram are all forms of network diagrams.
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| Network Diagram
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A network diagram is a graphic representation of activity sequence and relationships. Activity boxes are connected together with one-way arrows to indicate precedence. The first activity is placed on the left side of the diagram with the last activity on the right side. Activity boxes are usually placed at different levels (not in a single row) to accommodate activities that are done simultaneously.
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