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chap 6 3/4/97 4:14 PM Page 63
task analysis 63
Even though these examples described relatively simple
tasks, you will note that it is somewhat awkward to show in a
list the decisions to be made and just how the actions resulting
from those decisions should be handled.
Flowcharting. There is a better way, called flowcharting. A
flowchart is easy to read and clearly shows the alternatives to
be followed when decisions are involved. Furthermore, it
reveals where information is still missing.
To flowchart a task, you need only two symbols to depict the
steps of the task: a rectangle to depict actions and a diamond
to depict decisions (see Figure 6.1). Other shapes, such as ovals
and squares, may be used to depict various outcomes, but the
rectangle and the diamond are all that are needed to show the
components of the task itself.
Figure 6.1
Step in the task Decision
Begin by writing down the event that causes the task to be
performed. Here are a few example events that initiate tasks:
• Phone rings.
• Customer asks _______.
• Red light comes on.
• Grinding sound is heard.
