Network Diagram With Crash Times

The owner wants you to you to finish the project in 110 days.

Network diagram with crash times. Arrows are used to indicate sequencing requirements. Determine each activity s duration and assign accordingly. For forward pass calculate the early start es and early finish ef. Normal cost and crash cost can now be calculated by adding values of all the activities given in the table.

After that an all crash table 10 7 is prepared. Find out the total float associated with each activity. Each of these steps is described in more detail below. In this video you will learn how to crash a project in order to reduce the overall project completion time.

By drawing the network with nor mal duration we see from following figure that critical path is 1 2 3 4 5. Some of the benefits of using network diagrams include. Figure 10 9 shows the all crash diagram. The project duration is therefore equal to 18 days.

The network and durations given below shows the normal schedule for a project. 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. On this path crash time 13 days from given data on critical path. Networkdiagrams paint a clear picture of how varying tasks fit in to a project and their specific interdependencies.

Each activity in the project is represented by a circle node or rectangle. Notations for drawing network diagrams a network diagram is a graphical representation of the entire project. Network models represent activities and milestones by arcs and nodes. Add the duration for each activity.

So es for task 5 is 14 days dependent on task 4 which is the longer task. Network diagrams are useful in project management in many ways. You can decrease crash the durations at an additional expense. This allows for useful duration estimation.

This just makes the calculations we have to do easier to follow. If we were to adopt the crash times for each and every activity we would have. Draw network diagram and identify the critical path what are the normal project duration and associated cost. Define the project logic.

Below we repeat the network diagram for the problem we considered before. The project precedence diagram can be developed based on either logic driven or resource driven constraints once the wbs is known. All its activities 1 5 5 6 and 6 7 are at crash time and crash cost. Further crashing of activities is not going to reduce the project duration as one critical path 1 5 6 7 has reached its compression limit.

Network diagrams help validate the time estimation for your project. Crash the network up to crash limit.