Network Diagram Forward And Backward Pass Solver

We try to make it a little bit more challenging this time so i would suggest for you to study the table try to do it yourself and then let s solve it together.

Network diagram forward and backward pass solver. In this case here we have 18 days. A critical path is a path with the least amount of slack float time. So es for task 5 is 14 days dependent on task 4 which is the longer task. After the forward pass our network diagram example looks like this.

In figure 2 we started with one. What is a float slack time. Perform a backward pass to determine the late finish lf and late start ls dates. Step 4 1.

Whereas backward pass represents moving backward to the end result to calculate late start or to find if there is any slack in the activity. Perform backward pass on critical path. If you are like most project managers you use project scheduling software to perform the calculations the software does the work for you. This is the project completion date from which the backward pass starts.

Perform backward pass to calculate late start and late finish. We found that when we performed the forward and backward pass calculations to find the latest and the earliest dates without affecting the duration of the project. Let s draw also an activity on node network diagram and perform the forward and the backward pass calculations for the following activities. The total float of activities on critical path is zero.

Furthermore if you look at it from a practical approach our calendars start from day 1. Forward pass is a technique to move forward through network diagram to determining project duration and finding the critical path or free float of the project. Two methods to calculate the forward and backward passes in a network diagram by jeffrey s. Calculate late start and late finish of activities on critical path.

Draw a network diagram task 1 4 days task 2 5 days task 3 3 days task 4 7 days task 5 4 days 0 4 4 9 14 18 4 7 147 task 5 is dependent on task 2 and task 4 being complete. As well as from the forward pass calculations we found the minimum duration of the project to be executed. Enter lf es for the final project task bottom right corner top right corner. Use forward and backward pass to de.

Forward and backward pass in network diagram is a very discussing topic of software project management. In figure 1 we started with zero and performed the forward and backward pass calculations. Float slack time is the time that an activity can be delayed without delaying the project. Project schedule network diagram indicating early start and early finish step 4.

What is the critical path.