Gantt Chart Comparison - Case Study

By Samit Banerjee


Analyse the various types of Gantt charts that can be used to schedule preparations for project negotiations related to construction of King Shaka Airport at Turner & Townsend (UK).



Gantt chart is a timeline scheduling tool that represents a visual representation of tasks in a project getting performed in a scheduled and sequential manner, (Rebiere & Rebiere, 2017). Gantt chart is used in a project’s timeline development because of its inherent support for visual representation of the critical path, dependency representation between different tasks, and an ability to check the progress of the project during as the project continues to move forward in a dynamic manner.

In coherence to the project associated with the construction of a billion dollar green-field airport at Turner & Townsend UK, ascertaining all aspects of time management, Gantt Chart plays a vital role. It can provide a visual presentation of the project plan in accordance to the timelines adopted during project planning. On wider basis, Gantt Charts are classified in two categories, namely, Progress Gantt Chart and Linked Gantt Chart. Both the types are having respective importance in various segments of project time analysis.


Progress Gantt Chart

By means of a Progress Gantt Chart, the project manager or sponsor can monitor the level of completion of respective activities associated with a project. As the name suggests, this type of gantt chart displays the progress of the project.

Figure 1: Progress Gantt Chart


As shown in the above figure, a horizontal bar chart using a combination of two key colours displays the status of all stages of the project. The horizontal axis represents the date range and the vertical axis represents the different stages of the project. From the date range, it is clear that the project starts from 01-July and ends on 02-September. The project goes through stages like planning meeting, development of business concept; develop specifications, development, testing, training and implementation. The two key colour codes, i.e., blue and red represents complete and incomplete status respectively. The planning meeting and develop business stage is completed and hence the bars are completely blue and shows 100% complete and closed status. Three stages after that are partially complete and hence have a mix of blue and red bars showing 77%, 75% and 50% completion respectively. The final two stages, training and implementation have not started yet and hence they are marked as “new” and the entire bar is red indicating incomplete status.

This type of Gantt Chart is useful in tracking the real-time status of the project. As in case of the construction of the billion-dollar green-field airport project at Turner & Townsend, this type of Gantt Chart can be useful for monitoring the project by means of segmentation. All activities should be sib-divided into smaller groups and each group supervisor must maintain respective progress gantt charts.


Linked Gantt Charts


Linked Gantt Charts are visual display of the timeline along with the dependencies of the tasks with each other. It is the most preferred method of timeline analysis for small projects as big projects have numerous activities whose representation may clutter with each other and provide a critical representation, which can be difficult to analyse.


Figure 2: Linked Gantt Chart



As shown in the above figure, the entire representation is divided into two segments. The left panel displays the tabular structure of all the activities involved in the project and the right panel is the graphical representation of the same. The green and blue shades of the horizontal bars shows the level of completion of individual stages and the black lines connecting the bars are the links displaying the dependency of each stage of activity with each other.

The project of construction of the green-field airport at Turner & Townsend is a combined form of many steps and activities. The project is associated with various phases of construction, technical planning, formulation of management strategies, resource and capital management which makes it complicated and huge. Hence, use of linked Gantt chart may not serve the purpose of providing distinct and clear timeline visualisation of the concerned project.



Use of Progress Gantt Chart along with critical path network diagrams can be useful for the project of construction of the billion-dollar green-field airport at Turner & Townsend. Critical Path Network Diagrams can effectively explain the link of the activities and their dependency with each other (Weaver P., 2017), and on the other hand, the Progress Gantt Chart can demonstrate the development status of the project. Project Gantt Chart can be prepared individually for each activity involved in the project or it may be prepared on department basis. Being easy to analyse and understand, it shall not be hectic to be grasped by semi-technical or non-technical members of the project team. Linked Gantt Chart on the other hand will lead to confusion due to cluttering of the lines and bars with each other.



Gantt Charts are useful tools as it helps the supervising team of any project get a clear image of the progress of the project on a single frame(Trumper M., 2017). It helps in decision-making process and try modifications and implement them for faster accomplishment of project activities. In relevance to the construction of the billon-dollar green-field airport at Turner & Townsend UK, being a big project, it certainly requires the aid of Gantt Charts as recommended in order to critically analyse each phase of development of the project.




Rebiere, O. & Rebiere, C., 2017. Mastering the Gantt Chart: Understand and Use the "Gantt Project" Open Source Software Efficiently!. s.l.:PublishDrive.

Virine, L. & Trumper, M., 2017. Project Risk Analysis Made Ridiculously Simple. s.l.:Imperial College Press.

Weaver, P., 2017. A Brief History of Scheduling: Back to the Future . Retrieved 29 January 2018.

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