<![CDATA[The maintenance of lathes in educational laboratory environments is crucial for supporting the effectiveness of practical learning. This study aims to develop a preventive maintenance guidebook based on best practices for lathes in the Mechanical Engineering Education Laboratory at Sriwijaya University. The research method used the 4D development model (Define, Design, Develop, Disseminate). Data collection instruments included expert validation questionnaires for content and media, as well as trial questionnaires for students. Validation results showed a validity level of 83% by content experts and 87% by media experts, both classified in the very valid category. Trial results indicated that this guidebook was considered practical and could enhance students' understanding of lathe maintenance implementation. With this book, preventive maintenance activities are expected to become an integrated culture in the practical engineering learning process. Perawatan mesin bubut di lingkungan laboratorium pendidikan merupakan hal yang krusial dalam menunjang efektivitas pembelajaran praktik. Penelitian ini bertujuan mengembangkan buku panduan preventive maintenance berbasis best practice pada mesin bubut di Laboratorium Pendidikan Teknik Mesin Universitas Sriwijaya. Metode penelitian menggunakan model pengembangan 4D (Define, Design, Develop, Disseminate). Instrumen pengumpulan data berupa angket validasi ahli materi dan media, serta angket uji coba pada mahasiswa. Hasil validasi menunjukkan tingkat kevalidan sebesar 83% oleh ahli materi dan 87% oleh ahli media, keduanya termasuk dalam kategori sangat valid. Hasil uji coba menunjukkan buku panduan ini dinilai praktis dan dapat meningkatkan pemahaman mahasiswa dalam pelaksanaan perawatan mesin bubut. Dengan buku ini, kegiatan preventive maintenance diharapkan menjadi budaya yang terintegrasi dalam proses pembelajaran praktik teknik.]]>
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