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A GUIDE TO TURNOVER RATE <br />Turnover Rate measures the activity of a library's collection, indicating the number of times each unit of <br />library material would have circulated during the year if circulation was spread evenly throughout the <br />collection. The turnover rate is determined by dividing the number of circulations by the number of items <br />in a particular section of the collection. For example, if you have a section of the collection that contains <br />1000 items and these items have circulated 1,200 times in the previous year, the annual turnover rate is <br />1.2. The average item in this section circulated 1.2 times within the last year. If you have another section <br />that contains 2,000 items and these items have circulated 1,500 times, the circulation rate is 0.75. If a <br />section has a relatively high turnover rate, it is one indication that more items may be needed to meet <br />demand. 12 <br />To determine the Turnover Rate: <br />Formula: Annual Circulation - Item Holdings = Turnover Rate <br />Example: A library with a LSAP13 of 90,000 holds 500,000 items (books, videos, audio, etc.) and annual <br />circulation is 1,500,000, the Turnover Rate = 1,500,000 - 500,000 = 3. <br />12 Source: LiLI, Idaho Commission for Libraries <br />13 LSAP: Legal Service Area Population <br />8 <br />