%I UNIVERSITAS SULTAN AGENG TIRTAYASA %X This study aims to develop a CNC & CAM textbook based on SKKNI and Project-Based Learning (PjBL) to address the limitations of teaching materials in the Mechanical Engineering Vocational Education Study Program at UNTIRTA. The method used is Research and Development (R&D) with a 4D model. The research subjects include expert validators and students. The instruments used were validation and practicality questionnaires, analyzed using descriptive quantitative and qualitative methods. The validation results achieved the category “Very Suitable” with a percentage of 88.33% from subject matter experts and 92.5% from media experts, as well as practicality of 79% from students with the category “Good,” thereby deeming the textbook suitable and practical for use. %L eprintuntirta53480 %O Penelitian ini bertujuan mengembangkan buku ajar CNC & CAM berbasis SKKNI dan Project-Based Learning (PjBL) untuk mengatasi keterbatasan bahan ajar di Prodi Pendidikan Vokasi Teknik Mesin UNTIRTA. Metode yang digunakan adalah Research and Development (R&D) dengan model 4D. Subjek penelitian meliputi validator ahli dan mahasiswa. Instrumen berupa angket validasi dan kepraktisan, dianalisis secara deskriptif kuantitatif dan kualitatif. Hasil validasi memperoleh kategori “Sangat Layak” dengan persentase 88,33% dari ahli materi dan 92,5% dari ahli media”, serta kepraktisan sebesar 79% dari mahasiswa dengan kategori “Baik”, sehingga buku ajar dinyatakan layak dan praktis digunakan. %T PENGEMBANGAN BUKU AJAR CNC & CAM BERBASIS SKKNI DAN PROJECT-BASED LEARNING %A FAJAR WAHYU PRATAMA %D 2025