Page 77 - Making Instruction Work

chap 6 3/4/97 4:14 PM Page 65

task analysis 65

Figure 6.2 Clean Spark Plugs
When initiated? a. Plugs are dirty.
b. Customer asks.

Open
hood
Locate
spark plugs
Cover fender
with protective
material
Remove
ignition wires
Remove
plugs

Need YES Replace
replacement? plug
NO
Need YES Clean
cleaning? plug
NO
Need YES Gap
gapping? plug
NO
Is there
YES
another plug
to check?
NO
Test
the plugs
Replace plugs
in engine
Re-connect
ignition wires

Engine NO Complete
run OK? designated steps
YES
Clean tools and Clean grease Complete Done
equipment from car paper work

When terminated? Engine runs smoothly.