1.The network diagram3
2.The timing of activities and the total float3
3.The project duration and the critical path4
4.Calculation of the finish date4
5.Delays and early completion and the effects on the duration4
a) Activity ‘E’ is delayed 1 day4
b) Activity ‘P’ is delayed 1 day4
c) Activity ‘Q’ is completed 1 day earlier5
6.Limitations of the network diagram5
3.The Project Manager7
Planning and monitoring9
The Project life cycle9
Work Breakdown Structure (WBS)10
Organization Breakdown Structure (OBS)10
Critical path analysis (CPA)11
Closing the project12
1. The network diagram
My name is John Doe and I am the project manager for the Vobien Ltd. For a better overview I have produced a network diagram, which you can find in the appendix. The whole project has a duration of 50 days.
2. The timing of activities and the total float
The timing of the activities is shown in the diagram in the appendix of this work. Except ‘A’, all activities are proceeding by one or by more activities. ‘A’ is the first activity and therefore the beginning of the project.
A is followed by B – B is followed by C / D/ E – C / D / E are followed by F.
The activity-on-node diagram gives a lot of information. It shows the EST (earliest start time), the duration of each step, the EFT (earliest finish time), LST (latest start time), the total float, and the LFT (latest finish time).
To determine the total float, it is important to understand the connections between the various nodes. The duration depends on the gap between EFT and LFT.
To start with node F, we need to complete C / D and E. Node C has a duration of 7 days and a EFT of 14 days – Node D has a duration of 2 days and a EFT of 9 days. Therefore, node D has a total float of 5 days. To calculate the total float of each of the nodes, we need to set all of the LFTs to the highest value. In this example it’s the value of the node C, because it has the longest duration.
3. The project duration and the critical path
The duration of the Vobian Ltd. project is about 50 days. To get this number, we need to add the longest duration of all nodes. A few of them run simultaneously, in this case we choose the longest duration and add them to the total duration. The critical path is marked green in the diagram. The critical path is the longest way within the project, but it is also the shortest duration to complete the project. In this project, the critical path is: A – B – C – F – G – K – L – M – N – O – Q – R. The duration of this path is 50 days. It is called the critical path because of the fact, that if one of the nodes has a delay of two days, the whole project will have a delay of two days.
4. Calculation of the finish date
As already calculated, we have a duration of 50 days for the project. With a 5 day working week we need a total number of 10 weeks to complete the project. When we start the project on Monday, the 4th of February 2013 – the 12th of April 2013 will be the day on which the project ends.
5. Delays and early completion and the effects on the duration
a) Activity ‘E’ is delayed 1 day
Activity ‘E’ is not a part of the critical path. There will be no effect on the total duration. The float will be reduced from 2 days to 1 day.
b) Activity ‘P’ is delayed 1 day
Activity ‘P’ is not a part of the critical path. There will be no effect on the total duration. The float will be reduced from 3 days to 2 days.
c) Activity ‘Q’ is completed 1 day earlier
Activity ‘Q’ is part of the critical path. There will be an effect on the total duration. The total duration of the project would be reduced to 49 days. Every critical node, which is completed...