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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.
The critical path method (CPM), or critical path analysis (CPA), is an algorithm for scheduling a set of project activities. [1] A critical path is determined by identifying the longest stretch of dependent activities and measuring the time [ 2 ] required to complete them from start to finish.
Project dependencies can also be depicted by a predecessor table. Although such a form is very inconvenient for human analysis, project management software often offers such a view for data entry. An alternative way of showing and analyzing the sequence of project work is the design structure matrix or dependency structure matrix.
Activities that are on the critical path have a slack of zero (0). The duration of path adf is 14.83 work days. The duration of path aceg is 19.51 work days. The duration of path beg is 15.67 work days. The critical path is aceg and the critical time is 19.51 work days. It is important to note that there can be more than one critical path (in a ...
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.
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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 activity can be allocated to each resource, giving the total project cost.
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