02-Key Definitions .pdf

Event on node a network diagramming technique in

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Event-on-Node: A network diagramming technique in which events are represented by boxes (or nodes) connected by arrows to show the sequence in which the events are to occur. Fast Tracking: Compressing the project schedule by overlapping activities that would normally be done in sequence (such as design and construction). Float: The amount of time that an activity may be delayed from its early start without delaying the project finish date. (Also called slack, total float, and path float). Forward Pass: The calculation of the early start and early finish dates for the uncompleted portions of all network activities. Free Float (FF): The amount of time an activity can be delayed without delaying the early start of any immediately succeeding activities. Gantt Chart: A graphic display of schedule-related information using bars. Hammock: An aggregate or summary activity. Hanger: An unintended break in a network path. Hangers are usually caused by missing activities or missing logical relationships. Lag: A modification of a logical relationship which directs a delay in the successor task. Late Finish Date (LF): In the critical path method, the latest possible date that an activity may be completed without delaying a specified milestone (usually the project finish date).
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Late Start Date (SF): In the critical path method, the latest possible date that an activity may begin without delaying a specified milestone (usually the project finish date). Lead: A modification of a logical relationship which allows an acceleration of the successor task. For example, in a FS relationship with a 10 day lead, the successor can start 10 days prior to the completion of the predecessor. Level of Effort (LOE): Support type activity (e.g., vendor or customer liason) that does not readily lend itself to measurement of discrete accomplishment. Generally characterized by a uniform rate of activity over a specific period of time. Logical Relationship: A dependency between two project activities or between an activity and a milestone. Four possible types: FS, FF, SS, and SF. (see logical relationships under concepts). Master Schedule: A summary level schedule which identifies the major activities and milestones. Milestone: A significant event in the project, usually completion of a major deliverable. Milestone Schedule: A summary level schedule which identifies the major milestones. Path Convergence: In mathematical analysis, the tendency of parallel paths of approximately equal duration to delay the completion of the milestone where they meet. Precedence Diagram Method (PDM): A network diagramming technique in which activities are represented by nodes. Activities are linked by precedence relationships to show the sequence in which the activities are to be performed. Program Evaluation and Review Technique (PERT): An event-oriented network analysis technique used to estimate project duration when there is a high degree of uncertainty with the individual activity duration estimates.
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