Table of Content
1) Task 1
1.1 Project Network Diagram
1.2 Determination of Timing of Activities and Total Float
1.3 Project Duration and Critical Path
1.4 Earliest Date Calculation
1.5 Effects of Duration Changes
1.5a) Activity E is delayed by 1 Day
1.5b) Activity M is delayed by 1 Day
1.5c) Activity R is completed early by 1 Day
1.6 Limitations of Network Diagrams
2) Task 2
2.1 Introduction of Project
TASK 1 (Educare Ltd)
Below is the Network Diagram for Educare Ltd project. It shows a breakdown of the activities into small pieces and all activities needed to complete the project. (Field & Keller, 2007)
The timing of activities is important as it helps with the planning of all resources. (Larson & Gray,5th edition).
The Timing of Activities is done by analysing the Forward Pass and Backward Pass throughout the Network Diagram.
The Forward Pass is the process of going through the network (Activity A – Activity R) from time zero. It goes through the network from the earliest start (ES) to the earliest finish (EF) with the minimum total project duration. The ES is the same as the EF of the next activity. For activities done simultaneously, EF comes from the latest finish among them.
The Backward Pass is the opposite. It is done by going through the network from the final activity to the first (Activity R – Activity A) and using the late start (LS) and late finish (LF) for each. It starts with Float as zero, which uses the number of days in the Forward Pass as its starting point. The LS is done by taking away the days from the LF for each single activity. For concurrent activities, the LF is the earliest LS of the previous activities. This is important when it comes to identifying the Critical Path and Total Float. It assumes all activities will start and finish at the latest date and will finish as the earliest of the previous activity starts.
Total Float (TF), also known as Slack, is the number of days where delays or luxuries of time are allowed from that will not affect the project completion date. This is done by using LF-EF. For example in Activity E, we use the LF (12) to minus the EF (9) thus the TF is 3. TF for this activity will be 3 days. (Field & Keller, 2007)
The Project Duration is the time taken to complete the whole project. In this project, it will be 40 days. This is done by adding the number of days from Activity A to R. When there are multiple activities, the latest time is taken.
Next is Critical Path (CP). It identifies the activities which has no room for error, or zero Slack. It is identified by linking all the activities with zero TF. For this project, it is as follows:
A B CGHJKLNOPQR
By using the Total Project Duration of 40 days with a 5-days work week (no holidays in between) and starting on Monday 6th January 2014, we are able to compute the below table.
With reference to a 2014 calendar and we going forward 40 days, the end date will be 28 February 2014.
Activity E is not part of the CP and the TF is 3 days, thus a delay in 1 Day will not affect the project completion date. 1.5b)
Activity M is also not part of the CP and with the TF of 2 days, it will not affect the project completion date. 1.5b)
Activity R is part of the CP, which will affect the project completion...
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Field, M., Keller, L. (1998) Project Management. Open University
Larrson, E., Gray, C. (2011) Project Management, The Managerial Process (5th edition)
Mubarak, S. (2005) Construction Project Scheduling and Control
Harold, K. (2011) Project Management Metrics, KPIs and Dashboards: A Guide to Measuring and Monitoring Project Performance
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