ABSTRAK
Kajian dalam tesis ini bermaksud mengevaluasi sejauh mana pelestarian bahan-bahan pustaka deposit di Perpusda-DIY telah dikerjakan dengan mengikuti pedoman yang diberikan oleh Perpusnas-RI, baik dalam hal pelaksanaan teknisnya maupun dalam hal perencanaan dan manajemennya. Kajian dilakukan dengan mengamati di tempat dengan menggunakan Survey Form Cunha yang telah dimodifikasi, dan petunjuk Suchman dalam soal evaluasi proses manajemen.Kajian menyimpulkan bahwa dalam hal teknis pelestarian bahan-bahan pustaka Perpusda-DIY telah banyak melakukan usaha pelestarian dengan benar, sekalipun -- karena beberapa faktor -- hasilnya belum dapat dinilai optimal menurut tolok baku yang telah diberlakukan oleh Perpusnas. Faktor kendala itu tidak hanya bersifat teknis, akan tetapi juga bermula dari persoalan manajemen, khususnya belum terwujudnya value formation yang meyakini tugas pelestarian bahan-bahan pustaka sebagai tugas pelestarian informasi. Belum terwujudnya value formation juga menyebabkan tidak tertegaskannya tujuan akhir (goal) kegiatan pelestarian, dan pada gilirannya juga menyebabkan tiadanya perencanaan program-program pelestarian yang komprehensif.

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ABSTRACT
The study reported here is to evaluate the performance of Perpusda-DIY in the efforts to preserve its material collections. in a accordance with the guidelines consigned by Perpusnas. The evaluation is dealing with the technical as well as the managerial aspects of the preservation. The study has been carried out by making thorough observations on the spot, using Cunha's Survey Forms and also Suchman's suggested Evaluation Scheme at the analysis.The study conclude that -- judged from the technical point of view - Perpusda-DIY has accomplished a large part of its preservation efforts in proper manners. although due to some circumstantial factors the result has failed to reach the optimum level. to meet the standard of preservation performance commended by the Perpusnas. The constraining factor have been identified not solely technical in character, but also managerial at the very onset. No value formation on the real purpose of preservation -- i.e. to preserve valuable information and not merely to preserve materials -- could be observed up to the present time among the personnels of the Perpusda. Consequently, no definite goal has been clearly set, and no comprehensive preservation programs has been planned, so as to make all the preservation efforts look more purposeful and meaningful.