Editing Case-based reasoning (section)

== Process ==
[[File:CBR steps.png|alt=A diagram of case-based reasoning in French.|thumb|A diagram of case-based reasoning in [[French language|French]]<!-- Please replace this with a diagram in English; most readers (I assume) won't understand the diagram in French. ~Duckmather -->]]
Case-based reasoning has been formalized{{Clarify|date=December 2021}} for purposes of [[computer reasoning]] as a four-step process:<ref name="ref_origins">Agnar Aamodt and Enric Plaza, "[https://www.idi.ntnu.no/emner/tdt4171/papers/AamodtPlaza94.pdf Case-Based Reasoning: Foundational Issues, Methodological Variations, and System Approaches]," ''Artificial Intelligence Communications'' 7 (1994): 1, 39-52.</ref>

# '''Retrieve:''' Given a target problem, retrieve cases relevant to solving it from memory. A case consists of a problem, its solution, and, typically, annotations about how the solution was derived. For example, suppose Fred wants to prepare blueberry [[pancakes]]. Being a novice cook, the most relevant experience he can recall is one in which he successfully made plain pancakes. The procedure he followed for making the plain pancakes, together with justifications for decisions made along the way, constitutes Fred's retrieved case.
# '''Reuse:''' Map the solution from the previous case to the target problem. This may involve adapting the solution as needed to fit the new situation. In the pancake example, Fred must adapt his retrieved solution to include the addition of blueberries.
# '''Revise:''' Having mapped the previous solution to the target situation, test the new solution in the real world (or a simulation) and, if necessary, revise. Suppose Fred adapted his pancake solution by adding blueberries to the batter. After mixing, he discovers that the batter has turned blue – an undesired effect. This suggests the following revision: delay the addition of blueberries until after the batter has been ladled into the pan.
# '''Retain:''' After the solution has been successfully adapted to the target problem, store the resulting experience as a new case in memory. Fred, accordingly, records his new-found procedure for making blueberry pancakes, thereby enriching his set of stored experiences, and better preparing him for future pancake-making demands.