Time and progress chart of a construction is known as:

Explanation:

Bar chart or Gantt chart:

• Bar chart were introduced by Henery Gantt around 1900 A.D., therefore they are also called as Gantt chart.
• Bar chart is a graphical representation of activity v/s time.
• Usually horizontal axis represents the time duration and vertical axis represents activities or jobs to be performed.
• Activities are shown with the help of a bar.
• The beginning and end of each bar shows the ''time of start'' and ''time of finish'' of activity respectively.
• Therefore the length of the bar represents the time required for the completion of that activity.

Milestone chart:

• The milestone chart is a improvement over the original bar chart.
• In each activity, there are certain key events which mark the completion of certain portion of the main activity. Such key events are called as milestone.
• Milestone can be represented by a arrow, square or a circle on the bar of that particular activity.
• It has been observed that when a particular activity represented by a bar is very long. The details of subjectivities will be lacking.
• It is also a graphical representation of activity v/s time.

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