Benchmarking, Assessment and Outcome-based Evaluation Resources
AASL - Assessing the School Library Program
IMLS - Data Analysis Tools, Library Services
[OLD=1997] ACRL - Sources of Information on Performance and Outcome Assessment
[Decent bibliography maintained by UNC SILS of outcome based evaluation resources]
Measure, Assess, Improve, Repeat: Using Library Performance Metrics (NISO webinar, 2010)