A garage uses an expert system to help diagnose any problems with cars that need repair.

Mark scheme

Marking points from the official mark scheme (May/June 2024). The mark or mark type is shown in brackets.

1. [2] Any two from: • The simulation of intelligent behaviours by computers • A collection of data and the rules for using that data • Has the ability to reason • Has the ability to learn/adapt
2. [5] Any five from: • The user will enter data into the interface // The user will plug the car into an interface // The user is given questions using the interface • The inference engine will decide which questions to ask • ... by using the previous answers given • The inference engine will decide on a diagnosis • ... by comparing the data/answers entered to the knowledge base and rule base • ... by calculating which option is most likely if there are multiple • The interface will output the diagnosis/result • The explanation system shows how the diagnosis was reached