A bar chart is drawn for

Explanation:

Bar chart:

• The bar chart is the technique of project management. It consists of two co-ordinate axes in which the time required for the completion of the activity is marked on the X-axis and actively involved in its execution of the project is marked on Y-axis in form of bars.
• A bar chart consists of a number of vertically or horizontally placed bars and the length of the bars defines the relative magnitude of the values. It uses rectangular bars with lengths proportional to the values that they represent. A Gantt chart is a horizontal bar chart used for project management

Characteristics of a bar chart:

• The start and endpoints of the bar indicate the time of the finish and start time of the activity.
• The length of the bar represents the time required for the completion of an activity.
• The width of the bar does not signify anything i.e. it can be of any size.

Gantt Chart:

• Gantt charts are mainly used to allocate resources to activities.
• The resources allocated to activities include staff, hardware, and software. Gantt charts are useful for resource planning.
• A Gantt chart is a special type of bar chart where each bar represents an activity. 
• This chart lists the tasks to be performed on the vertical axis, and time intervals on the horizontal axis.
• The bars are drawn along a timeline. The length of each bar is proportional to the duration of time planned for the corresponding activity.
• With the use of this chart, we can check the progress of the project with
  • A visual display of the whole project,
  • Timelines and deadlines of all tasks,
  • Relationships and dependencies between the various activities,
  • Project phases