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     Use forward and backward pass to determine project duration and critical path

     28 Dec 2014

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     Calculating Critical Path with Forward and Backward Pass - Key Concepts in Project Management

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     How to calculate ET, ES, EF, forward-backward pass, LS LF, prob of completion, Gantt chart, in excel

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2. • • The backward pass and forward pass are complementary techniques in project management. The forward pass calculates the earliest start and finish times for tasks, establishing a timeline from the beginning of a project. In contrast, the backward pass works in reverse to determine the latest possible start and finish times.
     library.fiveable.me/key-terms/production-and-operations-management/backward-pass

     Backward pass - Vocab, Definition, and Must Know Facts - Fiveable

3. People also ask

   How do you calculate forward and backward passes?

   • Six is the EF for the activity. So the ES = 1, and the EF = 6 for activity C. This “rule of thumb” works well for people who like to use a visual method to calculate forward and backward passes, and it works both forward and backward. Others who prefer to have a standard formula at hand can use EF = ES + D – 1 for the forward pass.

   Two Methods to Calculate the Forward and Backward Passes in a Netwo…

   rmcls.com/wp-content/uploads/2018/03/PMP_9th_Ed__Study_Area_Two_Methods_20180305-1.pdf

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   How do you calculate LF on a backward pass?

   • On the backward pass, use the earlier of the two LS numbers. Thus, the LF of activity A is 14 decremented by one, which equals the end of week 13. Continue this process, watching for path convergence, until you reach the start of the project. For those who like formulas, LS = LF – D + 1 for the backward pass.

   Two Methods to Calculate the Forward and Backward Passes in a Netwo…

   rmcls.com/wp-content/uploads/2018/03/PMP_9th_Ed__Study_Area_Two_Methods_20180305-1.pdf

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   How do I perform a forward pass?

   • The forward pass also defines the project completion date, because once the Earliest Finish of the final task is determined you can simply add the task’s duration to obtain the completion date of the project. To perform a forward pass, start at the left hand side of the network diagram and proceed to the right:

   How to Perform a Critical Path Analysis - ProjectEngineer

   www.projectengineer.net/how-to-perform-a-critical-path-analysis-2/

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   What is a backward pass?

   • The formulas for the backward pass are shown below: As the name implies, this calculation step starts at the last activity in the schedule and proceeds backward through the schedule until the Late Start value is computed for the schedule's beginning activity. An example of the backward pass is shown in Exhibit 4. Exhibit 4. AON Backward Pass

   Understanding the basics of CPM calculations | PMI

   www.pmi.org/learning/library/basics-cpm-scheduling-software-axon-8170

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   How to calculate Aon backward pass?

   • AON Backward Pass To start the backward pass calculation, the EF value in the last activity is “dropped” down to the LF value. Now the backward pass formulas for late start and late finish can be applied. Note that in diagram above, the LF value for Activity B is based on the lowest LS shown by its two successors (Activity D and Activity E).

   Understanding the basics of CPM calculations | PMI

   www.pmi.org/learning/library/basics-cpm-scheduling-software-axon-8170

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   How do I perform a backward pass?

   • The sequence to performing a backward pass are: Start by choosing the highest EF of the final tasks, from the forward pass, and enter it into the bottom right box for each final task. In this case, 330 – Finishing, and 410 – Landscaping are both final tasks. The higher EF is 58.

   How to Perform a Critical Path Analysis - ProjectEngineer

   www.projectengineer.net/how-to-perform-a-critical-path-analysis-2/

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4. www.pmi.org › learning › libraryUnderstanding the basics of CPM calculations | PMI

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   The first step in the calculation process is known as the Forward Pass. In the forward pass, the Early Start and Early Finish values for each activity, along with the overall Project Duration, are calculated.

5. rmcls.com › wp-content › uploadsTwo Methods to Calculate the Forward and Backward Passes in a ...

   rmcls.com › wp-content › uploads

   Mar 5, 2018 · Two Methods to Calculate the Forward and Backward Passes in a Network Diagram (continued) Zero Method Now let’s look at the Zero Method. Remember the starts and inishes both represent the end of a time period. In this case, they represent the end of a week. Based on the same network diagram,

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6. www.youtube.com › watchUse forward and backward pass to determine project duration ...

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   Dec 27, 2014 · Check out http://www.engineer4free.com for more free engineering tutorials and math lessons!Project Management Tutorial: Use forward and backward pass to det...

   • Video Duration: 7 min
   • Views: 3.3M

   • Author: Engineer4Free

7. thedigitalprojectmanager.com › projects › pmUltimate Guide To The Critical Path Method For Project Managers

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   Sep 27, 2024 · There are two phases to the critical path method calculation: the forward pass and the backward pass. The Forward Pass. The forward pass identifies the early start and early finish dates of individual activities. The Early Start Date. The early start date of any activity is the latest of the following: The project start date

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8. www.pmcalculators.com › how-to-calculate-theHow to calculate the Critical Path with Examples

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   In project management, it is required to calculate these values for each activity which is achieved through a two-path process: a forward path to calculate ES and EF; and a backward path to calculate LS, LF and slack (float).

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9. www.projectmanager.com › guides › critical-path-methodCritical Path Method (CPM) in Project Management

   www.projectmanager.com › guides › critical-path-method

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   The critical path method formula has two parts; a forward pass and a backward pass. Forward Pass in CPM. Use the CPM diagram and the estimated duration of each activity to determine their earliest start (ES) and earliest finish (EF).

10. www.projectengineer.net › how-to-perform-aHow to Perform a Critical Path Analysis - ProjectEngineer

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    Step by step instructions to determine the critical path. How to draw a network diagram, perform a forward pass and backward pass, and determine floats.