Bar Graphs - Advantages and Disadvantages.

A bar graph or chart is a graphical representation of data in which typically bars of uniform width are drawn with equal spacing between them on one axis (say, the x-axis), depicting the variable. The values of the variable are shown on the other axis (say, the y-axis) and the heights of the bars depend on the values of the variable. Bar charts are in drawn in the shape of rectangle and it is used to represent discrete values.

Steps to build a bar graph and charts.

Following are the steps to build a bar graph

• The initial step is to Title of the graph or chart, Label for each axis and Scale for each axis from the table

• Decide the frequency axis and whether bar charts will go horizontally or vertically

• Draw a set of axes that is to use to build the chart.

• Use the data from the given table to draw in the bars on the graph.

Advantages and disadvantages of bar graph or charts

Advantages of bar charts or graph:

• Easy to prepare
• Easily understood by all parties
• It shows the total plan in impact form.
• Good communication tool
• Comparison can be made easy and it will save time of the user to make quick comparison of large data.

Disadvantages of bar charts:

• It does not show inter relationships between actions

• Managing/ supervising projects becomes difficult without those relationships between activities
• It is difficult to evaluate the impact of an unexpected event on the rest of the construction process