The Alliance maintains a voluntary three copy duplication threshold for books. Library staff apply this policy within the context of their patrons' needs. Below are documents on the development of the threshold.
Unneccesary Duplicate Threshold Guideline (Oct. 2010)
Threshold Recommendations for Council (Nov. 2010)
Orbis Cascade Orders Through YBP 2009 (May 2010) - To be linked. Will require a login.
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)