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While demand-driven acquisition (DDA) A pproval plans and demand-driven-acquisition (DDA), also known as patrondriven acquisition (PDA), have come to be known as opposing methods of library collection building. With a focus on setting parameters so that books will be acquired soon after publication, but before a user expresses an actual need, approval plans are rooted in a just-in-case model. By contrast, libraries using DDA methods only acquire materials when users directly access or request them, and so, DDA epitomizes a just-in-time approach. However, a hybrid approach, essentially a demand-driven-preferred approval plan, can enable libraries to provide access to more content at a lower overall cost. While approval plans enable libraries to purchase monographs which they then own, DDA plans allow libraries to tailor a grouping of unowned items that library users may access, with the library only expending funds when an item is used. As Alison Scott noted, "The technical innovations that have enabled DDA to flourish have allowed for a harmony to develop between these seemingly conflicting collection development philosophies (just-in-case versus just-in-time)." 1 Pollak Library at California State University, Fullerton (CSUF) has taken advantage of those technical innovations and developed a DDA-preferred approval plan. It is common for an approval plan to be print preferred, paperback preferred, or e-book preferred, meaning that when a book is slated to be sent to a library on the basis of an approval profile, the preferred format is provided if it is available.

No abstract

While California State University, Fullerton's Pollak Library has an e-preferred approval plan for all subject areas, the Library still continues to receive a number of print titles on approval. However, 25% of the print approval books received in the 2013-14 fiscal year were published by only eight publishers, all of which actively publish their books in e-format. This paper investigates the reasons why print books were supplied over potentially available e-versions. In some cases, individual titles were only published in print, while others were available as e-books, but could only be purchased within collections. Others were available for purchase as individual e-books, but not via the Library's primary aggregator. Options for approval profile adjustments to further reduce print approval receipts are offered.

California State University, Fullerton's Pollak Library is working toward the goal of providing as much content in electronic format as possible. To address this need along with a shrinking budget for monographs, the Library recently moved to not only an e-preferred approval plan, but actually a demand-driven-preferred approval plan. Pollak Library had a successful demand-driven acquisitions (DDA) plan in place for some time, in which slipped approval plan titles were automatically added to the Library catalog and made available for short-term loan via DDA. With some slight workflow adjustments, approval plan titles that were sent automatically as books, rather than slips, are also being made available for short-term loan via DDA rather than being purchased automatically. Initial results demonstrate that both goals of providing more electronic content and saving funds are being met.