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This is a critical piece of the puzzle. There are three different estimates of activity duration in PERT: 1. It involves the estimation of the amount of time required by a certain project activity given the available resources.

We will cover more on this in the next two sections. Next, the Earliest Time (TE) and the Latest Time (TL) are figured for each activity and identify the slack time for each activity. In the Project Management Body of Knowledge (PMBOK), the main output of the Estimate Activity Duration process are Activity Duration Estimates.

1.
Much like how a project’s work is broken down into activities and work packages, the activity cost estimate breaks the project’s costs down to the activity level in order to improve the reliability and accuracy of the estimate.

Determine the following: Expected activity times Earliest start and finish times Latest start and finish times Activity Slack Optimistic 2.
Most Likely. This happen directly after cost estimating. Pessimistic 3. Activity Cost Estimates are a valuable project management tool for determining the costs for a project. Following is an … The key benefit of this process is that it provides the amount of time each activity will take to complete, which is a major input into the Develop Schedule process. The following probabilistic activity time estimates are for a CPM/PERT network.

Optimistic time, expressed as ‘t o ‘,represents estimate of minimum possible time by which an activity can be completed assuming that everything is in order according to the plan and there can be only minimum amount of difficulty.. 2. Once you've estimated the time needed for each task, you can prepare your project schedule . You can then create a Gantt Chart to schedule activities and assign resources … When it comes to deriving the estimates, the PERT model takes a statistical route to do that. Add your estimates to the draft activity list that you produced in the second step, above.

Estimate Activity Durations is the process of estimating the number of work periods needed to complete individual activities with estimated resources. Optimistic (to), most likely (tm), and pessimistic (tp) time estimate for each activity Activity precedence relationships-Outputs Graphical representation of project Expected activity and path completion times Variance of activity and path completion times Probability project completed by specified time

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