Duplication Threshold > Orbis Cascade Alliance

About
- Overview of the Alliance
- Membership Application
- Institutional Representatives
- Members
- Membership criteria
- John F. Helmer Professional Development Award
- Council
- Working at the Alliance
- COVID-19
- Board
- History of Alliance
- Strategic Plan Overview
- Incorporation
Contact
- Alliance Staff
- Email Lists
- Report Forms
Documentation
- Archival Collection Management
- Discovery & User Experience
- Systems
- Collection Development
- Electronic Resources
- Technical Services
- Digital Collections
- Encoded Archival Description (EAD)
- Cross Program
- Digital Preservation
- Resource Sharing & Fulfillment
Programs
- Discovery & User Experience
- Systems
- Resource Sharing & Fulfillment
- Technical Services
- Shared Content
- Unique & Local Content
Teams
- Team Overview
- Systems
- Discovery & User Experience
- Unique & Local Content
- Resource Sharing & Fulfillment
- Finance Team
- Shared Content & Technical Services
Training
- Training Resources
- Archival Collection Management
- Digital Collections
- Encoded Archival Description (EAD)

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)