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In project management, float or slack is the amount of time that a task in a project network can be delayed without causing a delay to: [1]: 183 subsequent tasks ("free float") project completion date ("total float"). Total float is associated with the path.
The difference between the earliest and the latest start time. [1]: 502 [2]: 183 i.e. Slack = latest start date - earliest start day or Slack = latest finish time - earliest finish time. Any activities which have a slack of 0, they are on the critical path. solving the PDM, with: BS is an early start date. BM is a late start date.
In project management, a critical path is the sequence of project network activities that adds up to the longest overall duration, regardless of whether that longest duration has float or not. This determines the shortest time possible to complete the project. "Total float" (unused time) can occur within the critical path.
To determine the path times, add the task durations for all available paths. Activities that have slack can be delayed without changing the overall time of the project. Slack is computed in one of two ways, slack = LF − EF or slack = LS − ES. Activities that are on the critical path have a slack of zero (0).
According to Project Management, nodes should at least display the following information: [3] Identifier; Descriptive label; Activity duration; Early start time; Early finish time; Late start time; Late finish time; Activity float (slack) Activity Node Labels. Start and finish times are used to determine the critical path of a project.
Critical path drag is a project management metric [1] developed by Stephen Devaux as part of the Total Project Control (TPC) approach to schedule analysis and compression [2] in the critical path method of scheduling. Critical path drag is the amount of time that an activity or constraint on the critical path is adding to the project duration ...
The critical chain method adds "buffers" in the planning to anticipate potential delays in project execution. [3] Float or slack time in the schedule can be calculated using project management software. [4] Then the necessary resources can be estimated and costs for each
A Gantt chart created using Microsoft Project. Note (1) the critical path is in red, (2) the slack is the black lines connected to non-critical activities, (3) since Saturday and Sunday are not work days and are excluded from the schedule, some bars on the Gantt chart are longer if they cut through a weekend.