1. Principle of Milestone Chart
The shortcomings or the inadequacies of the bar chart have been modified to some extent in milestone chart. In every activity, there are certain key events which are to be carried out for the completion of the activity. Such key events are called milestones and they are represented by a square or circle. These events are those which can be easily identified over the main bar representing the activity.
It has been observed in a long time activity the details will be lacking. If the activity is broken into a number of sub-activities or key events each one can be recognised during the progress of the project. In such cases controlling can be done easily and some inter-relationships may be established between the activities. In a milestone chart, the events are in chronological, but in a logical sequence. Figures 31.3 and 31.4 show the conventional bar chart and milestone chart.
Figure 31.3 Conventional bar chart
Figure 31.4 Milestone chart
2. Limitations of Milestone Chart
Following are the limitations of a milestone chart:
- This method has one great deficiency, that is, it does not clearly show the interdependencies between events.
- Here the events are in chronological order but not in a logical and sequential order.
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