Duplication Threshold > Orbis Cascade Alliance

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About the Alliance Threshold Project

The Alliance advises a voluntary three-copy duplication threshold for books. Library staff apply this consortial guideline when possible within the context of their respective collection and user needs.

Documents related to the development of the threshold:

Unneccesary Duplicate Threshold Guideline (Oct. 2010)
Threshold Recommendations for Council (Nov. 2010)
Threshold Pilot Assessment Procedures (Jan. 2011)
GOBI Data Analysis Example for Threshold Pilot (Jan. 2011)
Threshold Pilot YBP Procedures for Selectors (Jan. 2011)
Threshold Pilot Presentation (Jan. 2011)