Test: Introduction of Construction Planning & Management - Civil Engineering (CE) MCQ

A bar chart consists of two coordinates axes, one (usually horizontal axis) representing the time elaphsed and the other (the vertical axis) represent the jobs or activities to be performed.

Milestone chart is a modification over the original Gantt Chart when a particular activity, represented by a bar on a bar chart is very long, the details lack. If however, the activity is broken or subdivided into a number of sub-activities each one of which can be easily recognized during the progress of the project, controlling can be easily done and inter relationships between other similar activities can be easily established.

Drawbacks of bar charts are:
Suitable only for small job, no inter-dependency between the activities can be determined, cost control cannot be achieved and optimum use of machines and men cannot be done.

Critical Activities are the activities which if delayed, then whole project gets delayed. Here, we are assuming that some events can only start after previous one are finished.
Thus, if A gets delayed then C will be delayed and following which E will be delayed leading to project delay. Similar, can be said for C and E.
Thus, A, C and E are critical activities.