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All Journal Jurnas Nasional Teknologi dan Sistem Informasi Sistemasi: Jurnal Sistem Informasi Industria: Jurnal Teknologi dan Manajemen Agroindustri JITMI (Jurnal Ilmiah Teknik dan Manajemen Industri) Jurnal Teknik Mesin Jurnal Teknik Mesin Cakram Jurnal Sistem Teknik Industri INVENTORY : Industrial Vocational E-Journal On Agroindustry Journal of Industrial Community Empowerment SAINTI: Majalah Ilmiah Teknologi Industri Bulletin of Islamic Research
Alfi, Rizki
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EVALUASI PELAKSANAAN SISTEM KESELAMATAN DAN KESEHATAN KERJA (SMK3) DI PT KUNANGO JANTAN Alfi, Rizki; Harif, Muhammad; Rudianto, Rudianto
JITMI (Jurnal Ilmiah Teknik dan Manajemen Industri) Vol. 5 No. 2 (2022): JITMI
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitmi.v5i2.y2022.p89-93

Abstract

Sistem manajemen keselamatan dan kesehatan kerja (SMK3) merupakan sistem yang menghubungkan memproteksi pekerja, perusahaan, lingkungan hidup, dan masyarakat sekitar dari bahaya akibat kecelakaan kerja. PT. Kunango Jantan merupakan perusahaan kontruksi sebagai penyediaan, pemrosesan, dan distribusi material baja dan beton siap pakai untuk industri konstruksi, kelistrikan, pertambangan, telekomunikasi, dan perhubungan. PT. Kunango Jantan telah membentuk Panitia Pembina Keselamatan dan Kesehatan Kerja (P2K3). Oleh sebab itu, penelitian ini bertujuan untuk mengevaluasi penerapan SMK3 di PT. Kunango Jantan dan mengetahui faktor-faktor yang mempengaruhi penerapan SMK3 tersebut. Metode penelitian dilakukan melalui wawancara dan penyebaran kuesioner kepada pihak manajemen dan pekerja di PT. Kunango Jantan.
Penerapan Pengendalian Persediaan Bahan Baku dengan Model Probabilistik dan Sistem Kuantitas Pemesanan Tetap Alfi, Rizki; Harif, Muhammad; Pharmayeni
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol. 3 No. 1 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v3i1.71

Abstract

Inventory of raw materials is very important for the smooth production of the company and meet consumer demand for the company in market demand. The demand for tire production fluctuates and causes the demand for products not to need to be met to order, due to the shortage of raw materials. To solve the shortage of raw materials, the company holds special orders in consideration of savings in ordering the cost of ordering messages. To overcome the shortage of raw materials, the company holds special orders or sudden orders which will increase the cost of the message. The purpose of this study is to determine the optimum ordering of raw materials to minimize total inventory costs by using a probability model of raw material inventory control with a fixed order quantity system (Q method). From the results of research using the probabilistic model of inventory control method Q method, obtained the optimal order quantity (q*), reorder point (rop), and safety stock (ss) with total inventory costs more efficient compared to the total inventory costs of the company's current policies. what is to be achieved in inventory control is to minimize the cost of ordering, and the cost of savings to the company.
Pengaruh Viskositas Oli terhadap Reduksi Amplitudo Getaran pada Sistem Redaman Viskus: Studi Eksperimental Alfi, Rizki; Rudianto; Harif, Muhammad; Sukma, Ari Aditia
Jurnal Teknik Mesin Cakram Vol. 8 No. 2 (2025): Jurnal Teknik Mesin Cakram
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jtc.v8i2.54685

Abstract

Redaman viskus memiliki peranan penting dalam pengendalian getaran mekanik dengan mengonversi energi osilasi menjadi energi panas melalui fluida pelumas. Penelitian ini menyajikan evaluasi eksperimental pengaruh tingkat viskositas oli terhadap karakteristik peluruhan amplitudo pada sistem massa–pegas–peredam yang berosilasi bebas. Empat oli komersial digunakan sebagai variabel redaman, yakni SAE 20, SAE 40, SAE 60, dan SAE 140. Parameter utama yang diamati meliputi pengurangan logaritmik (δ), rasio redaman (ζ), dan persentase peluruhan amplitudo dalam beberapa siklus osilasi. Hasil memperlihatkan adanya peningkatan yang konsisten pada kemampuan redaman seiring kenaikan viskositas; nilai ζ meningkat dari 0,08 (SAE 20) menjadi 0,18 (SAE 140) dan persentase peluruhan amplitudo dari 8,02% menjadi 17,10%. Temuan ini menegaskan bahwa pemilihan viskositas fluida merupakan parameter desain kunci untuk meningkatkan disipasi energi pada sistem redaman viskus di berbagai aplikasi, termasuk suspensi kendaraan dan peredam industri. Abstract: Viscous damping plays a crucial role in controlling mechanical vibrations by converting oscillatory energy into heat energy through a lubricating fluid. This study presents an experimental evaluation of the effect of oil viscosity on the amplitude decay characteristics of a freely oscillating damper–spring–mass system. Four commercial oils were used as damping variables, namely SAE 20, SAE 40, SAE 60, and SAE 140. The main parameters measured include logarithmic decrement (δ), damping ratio (ζ), and percentage decay amplitude over several oscillation cycles. The results show a consistent increase in damping capability with increasing viscosity; the ζ value increases from 0.08 (SAE 20) to 0.18 (SAE 140), and the percentage decay amplitude from 8.02% to 17.10%. These findings confirm that fluid viscosity selection is a key design parameter for improving energy dissipation in viscous damping systems in various applications, including vehicle suspension components and industrial dampers.
Work Posture Evaluation of Manual Onion Finishing After Mechanical Peeling in a Food Processing Industry Alfi, Rizki; Sawitri, Rahma; Nadiyah, Khairun; Maryam
Jurnal Sistem Teknik Industri Vol. 27 No. 4 (2025): JSTI Volume 27 Number 4 September 2025
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v27i4.21350

Abstract

Automation is increasingly applied in food-processing industries to enhance production efficiency. However, in onion-processing operations, peeling machines often fail to completely remove the outer skin, requiring workers to perform manual re-peeling to ensure raw-material quality. This task involves repetitive hand motions and forward-leaning postures, which may contribute to musculoskeletal strain. This study aims to evaluate the work posture of manual onion re-peeling workers using the Nordic Body Map (NBM) and Rapid Upper Limb Assessment (RULA) methods. Four workers participated in the study through direct observation, photo documentation, and questionnaire administration. NBM results indicated that the most frequent complaints occurred in the the shoulders, upper arms, elbows, forearms, wrists, and lower back. The average RULA score of 6 indicates a high-risk posture requiring prompt ergonomic intervention. The strong alignment between NBM and RULA findings reinforces the accuracy of the ergonomic diagnosis. This study highlights the need for ergonomic improvements such as workstation height adjustment, provision of lumbar-supported seating, micro-break scheduling, and simple tool redesign to reduce MSD risks and improve productivity in food-processing operations.
Co-Authors Abdul Aziz Ari Aditia Sukma Arsil, Fikri Azzahra, Aziza Demi Ramadian, Demi Gustiarini Rika Putri Harif, Muhammad Hermiza Mardesci Maria Isfus Senjawati Maryam Maryam Maryam Muhyi, Asep Abdul Nadiyah, Khairun NARO, AULIA Nofriadi Nofriadi Nur Zen Hasanah Pharmayeni Pharmayeni Pharmayeni Rifkiah, Ria Romadhan, Hendro Rudianto Rudianto Rudianto Ruzita Sumiati Sardani, Rizaldi Sawitri, Rahma Syahmer , Verra Syahmer, Verra Triyani, Wulan