Step 2: Document the rule-of-thumb that leads to the advice
for each case defined in step 1.
The rules should be written down in if...then format. As with
attribute naming, the expert system shell used to implement the knowledge
base will ultimately restrict the format of these rules. For now, getting
the logic down on paper is the objective. Some examples:
If the starter does not crank then the recommended action is recharge or replace the battery
The first two rules could optionally be expressed as a single rule: