4.2.2. Knowledge Representation

In this study, a rule-based approach was considered to codify experts' problem-solving knowledge through inference rules: IF <a condition or premise>, THEN <an action or conclusion> rules. In total, 60 rules were used using technical documentation, operations procedures, and interviews with experts, for interpreting control charts (X-bar and R) and providing diagnostic expertise.

1 RPN = O × S × D.
