The time lag may vary. In some areas, there may be enough response after 6 months to know what to keep and what can be withdrawn. If, however, a key faculty member is on leave, you may want to leave the books marked for a year or more. Before you actually pull the books to be weeded, check with Sandy Berestka in Technical Services to determine what they can handle and at what rate. In general, summer is the best time to pull the books, but it's also a time for other projects so coordination with Tech.
Services is very important.
To avoid generating a layer of record keeping, books should move through Tech. Services fairly quickly. For that reason, don't give them too much at once. The weeding slip is for our use in collecting responses from the public. Services does not need it in order to follow through on a withdrawal.