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All Journal Journal Industrial Servicess Industri Inovatif : Jurnal Teknik Industri Jurnal Abdidas JAMBURA JOURNAL OF PROBABILITY AND STATISTICS Integrasi : Jurnal Ilmiah Teknik Industri Journal of Systems Engineering and Management Journal of Mathematics, Computation and Statistics (JMATHCOS)
Atia Sonda
Universitas Sultan Ageng Tirtayasa
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Public Health Social Sciences Transportation Other

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Optimizing packaging process efficiency and quality control at a black carbon manufacturer through lean six sigma and design of experiment Bahauddin, Achmad; Trenggonowati, Dyah Lintang; Sonda, Atia; Yusuf, Vira Aleyda; Saeful Mutaqin, Ade Irman; Umyati, Ani
Journal Industrial Servicess Vol 9, No 1 (2023): April 2023
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jiss.v9i1.19052

Abstract

CI is a multinational company that involves manufacturing carbon black. The carbon black is packed in a 1250 kg jumbo bag and a 25 kg paper sack. Based on reject weight data for December 2019, 4.4% of paper sacks were rejected, with some caused by suboptimal packer machine settings. The study will use the design of experiment to determine critical quality factors for carbon black grade Sterling-V, identify waste in the packaging process, determine the sigma value in the packaging process, identify factors causing product defects, evaluate the risk priority number, and provide suggestions for optimal packaging machine conditions through factorial experiments. The reject weight of Sterling-V products due to reject weight was 123 out of the total production. The study results showed a sigma level of 2.205, with the engine factor being the main cause of reject weight (RPN 900). The optimal packaging machine conditions proposed for Sterling-V grade are Bulk Fill Cut Off (22.5 kg), High Pressure Air (7 bar), and Trim Final Cut Off (25 kg), which can reduce reject weight to 23 from total production.
Product quality control analysis using the six sigma method Ridwan, Asep; Sonda, Atia; Amelia, Amelia
Journal Industrial Servicess Vol 9, No 1 (2023): April 2023
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jiss.v9i1.19044

Abstract

Technological improvements and developments have significantly altered consumers' perceptions of product quality. The production of high-quality products is only possible through a robust manufacturing process. However, during the production process, various issues may arise, leading to the production of defective products. As a result, manufacturing companies like XYZ are now required to conduct product quality control to minimize the number of defects. The objective of this study is to control product quality by reducing defects at XYZ. To achieve this, we have employed the Six Sigma method, which involves several stages, such as define, measure, analyze, improve, and control. Our research indicates that product A is prone to defects, with density being the most common type. We have calculated the DPMO (defects per million opportunities) to be 2580.66, while the sigma value is 4.297. The process capacity that produces problems at XYZ is at an average level for US industry. Additionally, we have used the 5W + 1H approach to propose improvements during the Improve stage. However, our recommendation for enhancing the production process to reduce defects is still a work in progress and needs to be executed, assessed, and monitored to reach world-class industry standards.
Analisis Keluhan Musculoskeletal Disorders (MSDs) Dan Beban Kerja Mental Pada Operator Forklift Dan Helper Dengan Metode Nordic Body Map (NBM) Dan NASA-TLX (Studi Kasus PT. Asahimas Chemical) Herlina, Lely -; Mariawati, Ade Sri; Aprilianti, Widia; Umyati, Ani; Dewantari, Nustin Merdiana; Sonda, Atia; Yadi, Yayan Hary
Journal of Systems Engineering and Management Vol 3, No 1 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/joseam.v3i1.24705

Abstract

PT Asahimas Chemical adalah perusahaan yang memproduksi beberapa jenis bahan kimia dasar untuk memenuhi kebutuhan perkembangan industri nasional. Banyaknya produk yang diproduksi oleh PT. Asahimas Chemical membuat operator forklift dan helper sebagai tenaga manual harus bekerja dalam jangka waktu yang relatif panjang dan mengakibatkan keluhan nyeri pada beberapa bagian tubuh dan dapat memicu stres. Oleh karena itu, diperlukan penilaian tingkat keluhan musculosceletal disorder (MSDs) dan beban kerja mental yang dirasakan oleh operator forklift dan helper untuk nantinya dapat diberikan usulan perbaikan dan mengatasi permasalahan tersebut. Metode yang digunakan untuk mengetahui tingkat keluhan musculosceletal disorder (MSDs) ialah metode Nordic Body Map (NBM) dan untuk mengetahui tingkat beban kerja mental digunakan metode NASA-TLX. Berdasarkan hasil pengolahan data diperoleh nilai tingkat keluhan musculosceletal disorder (MSDs) terrendah bernilai 33 dan tertinggi bernilai 78 dengan rata-rata memiliki kategori “Sedang”. Hasil indikator beban kerja mental dari tujuh pekerja, 71% diantaranya memiliki beban kerja mental dengan indikator tinggi, 29% sisanya memiliki beban kerja mental dengan indikator sangat tinggi. Usulan perbaikan yang diberikan ialah memberikan alat bantu kerja seperti korset lumbal, hand trolley dan loading ramp serta pembuatan jadwal pengoperasian forklift dan jadwal kerja bagi helper.
Pengendalian Kualitas Produk Cover Tray Di PT XYZ Menggunakan Metode Six Sigma Bahauddin, Achmad; Sonda, Atia; Majainus, Muhammad Dzacky Alief Putra
Journal of Systems Engineering and Management Vol 4, No 1 (2025)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/joseam.v4i1.33827

Abstract

PT XYZ merupakan perusahaan industri injeksi plastik yang menjadi pemasok utama bagi LG dan sejumlah pelanggan aktif lainnya. Perusahaan menghadapi tantangan kualitas berupa tingginya cacat produk, khususnya pada produk Cover Tray Vegetable, dengan jenis cacat seperti crack, flashing, black dot, dan dirty oil. Penelitian ini bertujuan untuk mengidentifikasi penyebab cacat dan merancang perbaikan proses menggunakan pendekatan Lean Six Sigma dengan metode DMAIC (Define, Measure, Analyze, Improve, Control). Hasil analisis menunjukkan bahwa crack merupakan cacat dominan, dengan kontribusi signifikan terhadap tingkat defect sebesar 12,86% selama tahun 2024. Melalui Value Stream Mapping dan Process Activity Mapping, ditemukan aktivitas non value added (NVA) sebesar 140 detik dan necessary non value added (NNVA) sebesar 746 detik, yang kemudian berhasil dikurangi secara signifikan. Usulan perbaikan menghasilkan penurunan lead time dari 1287 detik menjadi 1076 detik dan peningkatan efisiensi proses dari 32,71% menjadi 39,13%. Pendekatan ini menunjukkan efektivitas Six Sigma dalam meningkatkan kualitas produk dan efisiensi proses produksi secara menyeluruh.
Stability Analysis and Estimation of the Basic Reproductive Ratio Using a SEITA-Type Model of HIV/AIDS Spread in Cilegon City Mahuda, Isnaini; Sholihin, Miftahus; Sonda, Atia; Sari, Putri Dina; Asshiddieqie, Rafi Ramadhan; Udiansyah, Naufal Arrafi
Journal of Mathematics, Computations and Statistics Vol. 8 No. 2 (2025): Volume 08 Nomor 02 (Oktober 2025)
Publisher : Jurusan Matematika FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/jmathcos.v8i2.9586

Abstract

HIV/AIDS remains a critical global health issue that requires a multidisciplinary approach to reduce its transmission. Understanding the transmission dynamics through mathematical models can assist in formulating effective intervention strategies. This study aims to analyze the stability of HIV/AIDS transmission model in Cilegon City using five compartments, namely Susceptible, Educated, Infected, Treatment, and AIDS or SEITA-type model. Subsequently, the basic reproductive ratio (R0) is estimated by constructing the Next Generation Matrix (NGM) and the dynamic simulation of the model is carried out using parameters calibrated based on HIV/AIDS data from Cilegon City. The Analysis of stability equilibrium points show that the disease-free equilibrium point is locally asymptotically stable when R0<1 and when R0>1 then endemic equilibrium point is locally asymptotically stable. Furthermore, the numeric simulation results indicate that the increasing parameter transition rate from the susceptible subpopulation to the educated subpopulation, the ARV treatment rate applied to the infected subpopulation and decreasing parameter transition rate from the educated subpopulation to the susceptible subpopulation, could suppress the basic reproduction number, thereby enabling effective control of the HIV/AIDS spread in Cilegon City.
Co-Authors Achmad Bahauddin Achmad Bahaudin Ade Irman Ade Irman Saeful Mutaqin Ade Sri Mariawati Amelia Amelia Ani Umyati Anting Wulandari Aprilianti, Widia Arina, Faula Asep Ridwan Asep Ridwan Asih Machfuzhoh Asshiddieqie, Rafi Ramadhan Bagaskara, Rafli Priyantama Ramadhan Bobby Kurniawan Bobby Kurniawan Damasa G Desmiani Delano, M Fabian Reinhard Dewantari, Nustin Merdiana Dyah Lintang Trenggonowati Erien Amelia Evi Febianti Faiz, Syukron Faula Arina Fellek Getu Tadesse Gunawan, Akbar Hadi Setiawan Herlina, Lely - Kulsum Kulsum Lely Herlina Mahuda, Isnaini Majainus, Muhammad Dzacky Alief Putra Maria Ulfah Miftahus Sholihin Muhammad Adha Ilhami Muhtar Muhtar Purbasari, Intan Putro Ferro Ferdinant Putro Ferro Ferdinant Ridwan, Asep Rurry Patradhiani Saeful Mutaqin, Ade Irman Sari, Febrianti Permata Sari, Putri Dina Syarif Abdullah Udiansyah, Naufal Arrafi ulfah, Maria Vicky Arya Wahyu Susihono WICAKSONO, AGUNG SATRIO Yadi, Yayan Hary Yusraini Muharni Yusuf, Vira Aleyda