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Measuring Population Reach of Singapore's Libraries: The Use of a Reach Index

ABSTRACT A Reach Index was developed in 2015 to find out the proportion of the Singapore population that the National Library Board (NLB) serves. This Reach Index is intended to ascertain NLB's unique reach among Singapore's resident population over a 12-month period. The composite index comprises five indicators: unique physical visitors to its libraries, active members, participants of its programs and/or exhibitions, users of its digital platforms, and volunteers who assist in library operations and the running of programs. At the end of the exercise, the Reach Index was able to help NLB identify the segments of the population that are well-reached as well as under-reached on an annual basis.