Illustrate sources of Census data. These form the heart of the Census. Telephone interviews and Census forms make up the bulk of Census data. Illustrate these sources with squares or another shape.
Illustrate the processes that take the data and convert it to a consumable statistic. The largest of these processes involves massive computer tabulation. Represent processes with rectangles or any other shape. Use arrows to demonstrate the data flow, or sequence, of the processes.
Illustrate the location of the data stores, or the physical or electronic storage locations of the data. For the Census, you might point to official governmental documentation. Make sure your data flow connects to your data stores. Now that you have fully charted the Census process, you can use your flowchart to illustrate the issues you have found.