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by Laurus Nobilis
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Performance Management

Project Scheduling - Structure 
(Arrow-on-Arrow and Gantt Chart) (E)


Project Management



What is the project? How to select and justify the project? How to plan and execute the project?


Posted: Sep 2010









After the work cascading structure is designed, it is necessary to define overall project schedule. The project scheduling describes project activity steps. It also projects the of time necessary for each activity to be done.

The project scheduling structure is defined by Arrow-on-Arrow approach. The AoA shows the task as an arrow, whole the event is represented as node:

Arrow to Arrow Approach



Project Management is a management method that is used to plan, organize and control project activities. The project is initiated by executive committee that will initiate project work.The basic concept of Project Management is the delegation of general management authority to the Project Leader.


In this example, tasks B cannot be started until A is completed. Also, tasks C and D cannot be started until both B is completed. C will take more time period than D will take. The project will not be finished until E is done.

The Gantt chart is a basic project management tool that is easy to construct and to interpret. This type of chart is very useful for describing the project schedule. The chart is constructed by taking the project schedule and superimposing the project’s tasks, the predecessor/successor relationships, and task durations onto a timeline. The project’s milestones are usually marked with diamond or some other distinctive symbol. The chart shows the timeline on the X-axis and the list of tasks on the Y-axis. A bar line is used to represent the amount of time the task will take and is placed on the chart between its start and stop times. The Gantt chart below is based on the previous AoA.

Gantt Chart






Continue on Project Management:
1. Project Management Overview 
2. 9 Areas of Project Management 
3. Project Lifecycle – 5 Stages of Project  
4. How to Determinine a Value of the Project? 
    4.1. Simple Payback 
    4.2. Average Return on Investment (ROI) 
    4.3. Net Present Value (NPV) 
    4.4. Internal Rate of Return (IRR) 
    4.5. Cost/benefit analysis 
    4.6. Time value of money 
    4.7. Present value of future payments 
    4.8. Justification of Addopted project 
5. Project Planning – Project Charte
6. Work Cascading Structure (WBS) 
7. Project Scheduling ( Arrow-on-Arrow and Gantt Chart ) 
8. Project Scheduling  ( CPM and PERT ) 
9. The Responisbility Matrix 
10. Resources and Budget Planning 
11. Clasification of Projects





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