On Deriving Design Equations for Information Retrieval Systems.

Cooper, William S.

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Peer reviewed

ERIC Number: EJ030355

Record Type: CIJE

Publication Date: 1970

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On Deriving Design Equations for Information Retrieval Systems

Cooper, William S.

Journal of the American Society for Information Science, 21, 6, 385-395, Nov-Dec '70

Design equations are derived for three types of retrieval systems. The equation in each case shows the relationship between expected search length, used as a performance measure, and certain system characteristics having to do with the distribution of index terms over the document collection and the number of errors in the search requests. (MF)

Descriptors: Case Studies, Indexing, Information Retrieval, Information Systems, Performance, Relevance (Information Retrieval), Search Strategies

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