TCD-CS-93-04 Cunningham, P., Smyth, B., Finn, D.
& Cahill, E.June 1993.
Retrieval issues in CBR systems for routine and non-routine
design
Abstract
We propose that analogical reasoning and case based reasoning (CBR)
tasks can be useful characterised as a continuum reflecting the
remoteness of the remindings involved. Remindings in CBR are
generally between semantically close case while analogical reasoning
depends on more abstract remindings. Rather than there being a
strict demarcation between CBR and analogical reasoning on these
grounds (with analogical reasoning concerned with inter domain
remindings and CBR dealingwith remindings within one domain)
there is a continuum of cognitive tasks that draw on past experience
during reasoning. Simpler tasks like diagnosis and classification are
located nera the CBR end. The question is how far the abstract end of
continuum can can the index-base retrieval techniques that are
effective in CBR be used (eg. discrimination networks). We are
considering episode retrieval as a two stage process; the first stage
being the initial filtering of the case base, and the second being
selecting the best case from this candidate set. We focus on the base
filtering stage and conclude that discrimination networks are
adequate for comparatively complex cognitive tasks such as routine
design. However, we argue that CBR systems for non-routine design
should provide interactive case retrieval and act as CBR
assistants.
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