CASE STUDIES OF CASE-BASED REASONERS

Jan Berge Ommedal26.09.2011

Case-Based Reasoners

• Six reasoners:– CHEF– JULIA– CASEY– HYPO– PROTOS– CLAVIER

• Other potential uses of CBR

CHEF (1986)

• Meal planner• Find recipe that solves most goals• Predict and resolve possible problems• Simulate (with casual-rules) and revise• Repair-strategies

CASEY (1988)

• Diagnose patients• Reconciliation with repair-rules• Extends the Heart Failure Program (HFP)• Same accuracy, better performance than HFP

JULIA (1988)

• Meal designer• CBR with requirement/constraint posting• Starts with general prototype

- Substitutions- Change structure (relax constraints)

• Dialogue with user

HYPO (1988)

• Law interpretation• Argue an issue based on earlier cases– Compare and contrast– Three-ply argumentation (Modus Ponens/Tollens)

• Generation of hypothetical cases

PROTOS (1989)

• Classification of hearing-disorders• Finds the most likely match given inputs• Links:– Reminding– Prototype– Difference– Censor

CLAVIER (1989)

• Autoclave layout generator• Improve autoclave-loading• No casual model for the domain• Still evolving

Other uses of CBR

• Retrieval-Only Aiding and Advisory System– Browseable/Searchable facility, coach or collegue– Passive role– Example: Architect’s Assistant– Example: Mediator’s Assistant– Example: WWII Battle Planner