Describes origin, development, and current state of Research Libraries Information Network's (RLIN) Command Analysis System, which digests large quantities of raw data on RLIN use and performance and produces useful graphs and reports. Recent results of system and pragmatic issues in analysis of online systems are noted. (7 references) (EJS)

Describes an expected precision (EP) measure designed to predict document retrieval performance. Highlights include decision theoretic models; precision and recall as measures of system performance; EP graphs; relevance feedback; and computing the retrieval status value of a document for two models, the Binary Independent Model and the Two Poisson…

Reports on study that used set of measures for characterizing performance with different databases and set of hypotheses for predicting search difficulties based on cognitive processes involved in decision-making aspects of information search. Highlights include confidence assessment, system design criteria, transparency, metatransparency, and…