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All Journal Pendas : Jurnah Ilmiah Pendidikan Dasar ComTech: Computer, Mathematics and Engineering Applications Industrial Research Workshop and National Seminar
Rachmatullah
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Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Other

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The Effect of 5K2S Implementation to the Opportunities of Increasing Productivity and Workplace Improvement in PT. Andesen Jaya Plastik Rachmatullah, Rachmatullah; Kasih, Tota Pirdo; Purba, Hardi Humiras
ComTech: Computer, Mathematics and Engineering Applications Vol 6, No 4 (2015): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v6i4.2197

Abstract

The success of Japanese companies in improving productivity is because they have a culture and a high work ethic to the application of KAIZEN management system. One such application is the Cultural 5S (Seiri, Seiton, Seiso, Seiketsu, Shitsuke). In the Astra group, 5S is known as 5K2S (Order, neatness, cleanliness, sustainability Discipline, Safety, and Service). This study aims to assess the success of the application of the system 5K2S of PT. Andesen Jaya Plastik relating to opportunities for productivity. The method used isquantitative method with a descriptive study. The type of data used is primary and secondary data. While the techniques used in collecting the data are interviews, questionnaires, and literature studies. The number ofrespondents was 31 employees. Analysis of the data used is descriptive and multiple linear regression analysis. The real success rate reachs 82.24% at the stage of familiarization (effective) and they have not yet advanced tothe next stage (prevention). The response of employees is between the Agree and Strongly Agree that is 4.11 point. The correlation between 5K2S to the opportunity of significant Productivity Improvement is Seiri/Order,Seiso/neatness, and Seiketsu/Sustainability.
Pengaruh Penggunaan Cairan Pendingin (Coolant) dan Perbedaan Waktu pada Proses Bubut terhadap Kekasaran Permukaan Baja AISI 4140 Meri Rahmi; Rachmatullah; Khotibul Umam
Prosiding Industrial Research Workshop and National Seminar Vol 13 No 01 (2022): Vol 13 (2022): Prosiding 13th Industrial Research Workshop and National Seminar
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (506.126 KB) | DOI: 10.35313/irwns.v13i01.4314

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh penggunaan cairan pendingin (coolant) pada proses bubut terhadap kekasaran permukaan material. Material spesimen dalam penelitian ini adalah baja AISI 4140. Variabel penting lainnya adalah waktu proses bubut di pagi dan sore hari. Hal ini terkait dengan pembagian shift kerja yang ada di industri manufaktur. Kondisi ini dapat mempengaruhi kekasaran permukaan akibat perbedaan waktu pada saat proses bubut. Kekasaran permukaan hasil proses bubut diambil dari 20 partisipan diukur menggunakan roughness surface tester. Terdapat empat skenario dalam pengambilan data yaitu, proses bubut pagi dengan coolant (1), proses bubut pagi tanpa coolant (2), proses bubut sore dengan coolant (3) dan proses bubut pagi tanpa coolant (4). Hasil roughness surface tester menunjukkan bahwa proses bubut dengan menggunakan coolant menghasilkan permukaan lebih halus dibandingkan tanpa coolant yaitu berkisar pada nilai dengan rata-rata Ra 1.67 - 2.23. Nilai ini masuk kategori permukaan halus. Perbedaan waktu proses bubut tidak signifikan mempengaruhi nilai kekasaran permukaan. Dapat disimpulkan bahwa kekasaran permukaan pada material AISI 4140 lebih baik menggunakancoolant daripada tanpa menggunakan coolant. Selain itu, proses bubut yang dilakukan pada pagi hari lebih baik daripada dilakukan pada sore hari. Hal ini terkait pada kondisi fisiologis operator mesin bubut lebih fokus dalam melakukan pekerjaan.
“Rekonstruksi Konsep Dasar Ilmu Geografi sebagai Fondasi Penguatan Literasi Spasial Mahasiswa dalam Memahami Fenomena Geosfer” Lilis, Lilis; wulandari, Gustini; Murtafiah, Siti; Rachmatullah, Rachmatullah
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 Nomor 02, Juni 2026 Published
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.45729

Abstract

Geography is the study of geospheric phenomena with an emphasis on spatial, environmental, and regional aspects. In geography instruction at universities, an understanding of basic geographic concepts serves as an essential foundation for students to develop spatial literacy skills. However, in practice, some students still lack a comprehensive understanding of basic geographic concepts such as location, distance, patterns, interactions, and spatial relationships. This situation indicates the need for reconstruction of basic geographic concepts in the learning process to improve students' spatial analysis skills. This study aims to analyze students' understanding of basic geographic concepts and formulate a learning reconstruction that can strengthen spatial literacy in understanding geospheric phenomena. The research method used was a qualitative descriptive approach, with data collection techniques through literature review, learning observations, and document analysis. Data were analyzed using interactive analysis techniques that include data reduction, data presentation, and conclusion drawing. The results indicate that the reconstruction of basic geographic concepts through spatial, ecological, and regional complex approaches improved students' understanding of geospheric phenomena more comprehensively, with an average score of 77.4%. Furthermore, the integration of spatial literacy into geography learning can also help students develop critical thinking skills regarding various environmental and regional phenomena. The overall average score is 76.5%. Thus, the correlation value is 0.67%, making the reconstruction of basic geographical concepts an important strategy in strengthening the competencies of geography education students in higher education.
Co-Authors Gustini Wulandari Humiras Hardi Purba Khotibul Umam Lilis, Lilis Meri Rahmi Murtafiah, Siti Tota Pirdo Kasih