<![CDATA[This scientific journal entitled "Analysis of Collection Development Activities in the Muhammadiyah 1 Yogyakarta High School Library" discusses how collection development is carried out by the librarians of the Yogyakarta 1 Muhammadiyah High School Library. In collecting and analyzing data, the author used descriptive research with a qualitative approach method. The Yogyakarta Muhammadiyah 1 High School library has a permanent source of funds to develop its collection which comes from school funds and BOS (Bantuan Operasional Sekolah) funds. The students at this school also have affluent or wealthy economic backgrounds. However, this becomes an obstacle to the pattern of implementing the collection development of the Muhammadiyah 1 Yogyakarta High School Library. The purpose of this research is to find out how collection development activities are carried out in the Muhammadiyah 1 Yogyakarta High School Library. The media used by the author in collecting data were direct observation at the research location, interviewing the head of the library, and documentation. Using qualitative descriptive data analysis techniques, namely data reduction. The results of the research show that the stages of collection development in the Muhammadiyah 1 Yogyakarta High School Library include collecting book catalogs from publishers, selecting and analyzing library materials, up to the stage of ordering and processing library materials. In determining library collection development policies, the library looks at the suitability of user needs. There are also inhibiting factors, including the density of formal learning hours and the socio-economic conditions of the students. Analyzing collection development activities in libraries can be a reference tool as well as an effort to provide solutions to the implementation of collection development for the sake of sustainable library development.]]>
