Question

Mile stone chart is an improvement over
1. Bar chart
2. CPM Scheduling
3. PERT scheduling
4. OPST scheduling

Answer 1

Correct Answer - Option 1 : Bar chart

Explanation:

Mile Stone chart:

• It is a modification over the original Gantt chart (Bar Chart). MIlestone is key events of main activities represented by the bar. Therefore they give an idea about the completion of sub-activities.
• Controlling can be better achieved with the help of milestone charts. But still, activity interrelationship and accountability of time uncertainty can not be depicted which can be overcome in-network technique. 

Work break down structure:

• These are incremental and hierarchical the composition of the project phases. It is a tree-like structure and it shows the description of the job for completion of the project from top to bottom.
• The main jobs are broken down into the number of small manageable units depending upon the size, time or efforts require for completion.

Bar chart (Gantt chart):

• It is a pictorial chart.
• It has two coordinate axes, the horizontal coordinate represents the elapsed time and the vertical coordinate represents the job or activity to be performed.
• The beginning and end of each bar represent starting and finishing time of a particular activity respectively.
• The length of bar shows the time required for completion.

Limitation of bar chart:

• Lack of degree of detail.
• A bar chart does not show the progress of work and hence it can not be used as a control device.
• A bar chart is unable to depict the interdependencies of various activities clearly.
• No provision to account for time uncertainties.
• A bar chart can not distinguish between critical and non-critical activities and hence resource smoothening and resource levelling can not be done.