Page 76 - Making Instruction Work
P. 76
chap 6 3/4/97 4:14 PM Page 64
64 making instruction work
• Screen shows error message.
• Patient screams.
Then write down what happens next. If it’s an action, write
it in a rectangle. If it’s a decision, write it in a diamond, and
draw lines from the diamond to the different actions that
would result from the decision. Sometimes there are several
actions that might be taken as a result of a decision. For exam-
ple, if the pressure is less than 10 lbs., do thing A; if the pres-
sure is between 10 and 50 lbs., do thing B; if the pressure is
more than 50 lbs., run! Usually, though, there are only two
alternatives: Do thing A if the decision is yes, and do thing B
if the answer is no. For example, if I were to flowchart the
spark plug cleaning example, it would look like this:
