weeding principles

Michael Vollmar-Grone (vollmami@oplin.lib.oh.us)
Thu, 14 Feb 2002 06:46:15 -0800 (PST)

Our weeding policies are built on a common set of broad principles,
applied to the individual formats, which are videotapes, DVDs, music
cassettes, music compact discs, audiobooks on cassette and audiobooks on
compact disc. I believe usage and currency are important considerations
in public library collections.

Our first step is to identify the Core Aspects of each collection.
These are based on a variety of criteria including:
best critical reviews (e.g. four star films),
significant industry awards (e.g. Cannes Palm d’Or, Audiofile’s
highest possible recommendation from professional journals (e.g. Library
materials concerning state and local area, and
expertise of those responsible for material selection whose judgment is
critical in applying the Vision and Mission of the library.

Our core groupings run between 15 and 20 percent of the collections and
are exempt from weeding. We also exclude materials less than two years

All other materials are removed based on usage and percentage of the

All of the collections are grouped into broad categories. Circulation
information is examined. Minimum uses are then determined for each
category based on the percentage of the collection. For instance, if
the children’s informational videotape category is 10 percent of the
video collection, then 10 percent of the total weeded videos must be the
least used children’s informational titles excluding the Core
Collection. In this manner, certain categories do not overwhelm the
collections merely through attrition or popularity. Balance is
maintained. Collection Balance is an aspect of Collection Maintenance
where those percentages are examined for appropriateness on a regular

Target removal numbers are determined by the previous two years
acquisitions. Weeding is a time consuming and sometime wrenching
process that I do not wish to repeat every year.

Hope this helps. Good luck.

Michael Vollmar-Grone
Amos Memorial Public Library
230 East North Street
Sidney, Ohio  45365

"Your Unique Video Source"