Figure 134. Pie chart comparing size of segments

d. Flow Charts. You would use these charts when presenting the

progressive steps of a process or operation because they clearly present

each step of an operation. There are two different types of flow

charts: logic symbol and illustrative (figures 135 and 136).

(1) Types of flow charts. A logic symbol flow chart uses standard

logic symbols or simple shapes, never both, to represent the steps in

the flow chart. An illustrative flow uses pictures to present the steps

in the flow chart. You should not mix the elements of the two types of

flow charts together.

(2) Preparing a flow chart (rough draft). When preparing a flow

chart, the steps of the process usually start at the top lefthand side

and moves left to right as well as top to bottom. If for any reason the

flow does not follow that path, you must use arrowheads to show the

direction and starting point of the process.

The primary flow lines are always heavier (darker) than the symbol

lines. You also must use uniform symbols throughout the chart. That

is, if you use one type symbol for a decision point, then use that

symbol for all decision points in the flow chart.

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