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All Journal JUTI: Jurnal Ilmiah Teknologi Informasi JURNAL ELEKTRO ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Journal of Information System Jurnal Ilmiah Universitas Batanghari Jambi CogITo Smart Journal Science and Physics Education Journal (SPEJ) MITRA: Jurnal Pemberdayaan Masyarakat Jurnal Mantik Jurnal Optimalisasi Jurnal Media Teknik dan Sistem Industri Journal of Industrial Engineering and Operation Management (JIEOM) Abdimisi Jurnal Pendidikan dan Teknologi Indonesia Industrika : Jurnal Ilmiah Teknik Industri International Journal of Multidisciplinary Research and Literature (IJOMRAL) RJOCS (Riau Journal of Computer Science) Jurnal Pengabdian Masyarakat Charitas Metris: Jurnal Sains dan Teknologi LATAR, Jurnal Arsitektur Integrasi: Jurnal Ilmiah Teknik Industri
Maria Angela Kartawidjaja
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Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Physics Public Health Social Sciences Other

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Persepsi Pengguna Sebagai Dasar Pengembangan Model Usability Aplikasi Mobile Commerce Hutahaean, Hotma Antoni; silalahi, Agustinus; Prabu Hidayat, Trifenaus; Sukwadi, Ronald; Kartawidjaja, Maria Angela
Metris: Jurnal Sains dan Teknologi Vol. 25 No. 01 (2024): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v25i01.5451

Abstract

The intense competition between developers, resulting in efforts to determine users' needs, is increasingly important. Usability An application can affect the continuity of application use. In this study, the user's loyalty is also used to analyze usability. This study examines user perceptions about user interaction characteristics when interacting with the mobile commerce application and considers users' loyalty. This research is essential to find out the needs of users of a mobile commerce application, which can be input to the developer in the design stage. This study uses 149 respondents' online shopping transactions in Jabadetabek and outside Jabodetabek, Indonesia. Data were analyzed using the Structural Equation Modeling (SEM) model. The results showed that users' perception of effectiveness, satisfaction, and learning influenced usability. This model can explain 42.6% of the user's usability variation when using it. This model can explain the usability of the Mobile Commerce application quite well. As a practical implication, this study shows the factors that support the characteristics of user interaction and application systems at the stage of defining the requirements for developing mobile commerce applications.
Optimasi Kualitas Pengelasan Dinding Tangki: Pendekatan Six Sigma dan FMEA (Studi Kasus: Cleaning dan Over Haul Tangki PT. Pertamina RU III) Adiguna, Brian; Kartawidjaja, Maria Angela; Sukwadi, Ronald
Integrasi: Jurnal Ilmiah Teknik Industri Vol 9 No 2 (2024): Integrasi : Jurnal Ilmiah Teknik Industri
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/integrasi.v9i2.206

Abstract

Tangki penimbun (Storage Tank) adalah elemen penting dalam berbagai industri seperti minyak dan gas, kimia, pangan, dan farmasi. Fungsinya adalah menyimpan bahan cair atau gas dalam jumlah besar secara aman dan efisien serta sebagai penyangga antara proses produksi dan distribusi. Selain itu, tangki ini juga berperan dalam pengendalian kualitas produk yang disimpan, sehingga aspek keselamatan harus diperhatikan melalui inspeksi rutin selama konstruksi dan operasi. Penelitian ini dilakukan di PT. Pertamina RU III Plaju yang bergerak dalam bidang Oil and Gas pada proyek cleaning dan overhaul storage tank oleh seorang welding inspector untuk mengawasi kualitas pengelasan, yang merupakan faktor kunci dalam menentukan kekuatan struktural dan keselamatan tangki. Penelitian ini bertujuan  memberikan rekomendasi perbaikan dalam menurunkan tingkat defect rate proses pengelasan yang melebihi batas toleransi. Metode yang digunakan adalah Six Sigma dan Failure Mode Effect and Analysis. Hasil dari penelitian ini adalah faktor manusia dan metode adalah faktor yang sangat signifikan mempengaruhi terjadinya defect pada pengelasan, maka perlu adanya penanganan yang serius dan tindakan yang tepat pada faktor manusia dan metode untuk mengurangi tingkat defect yang melebihi batas toleransi sebesar 10%.
Analisis Permohonan Pekerjaan Tambah: Studi Kasus Proyek Perbaikan Akses Jalan di PLTD Waibalun Muda, Yosef Norbertus Tembu; Kartawidjaja, Maria Angela; Sukwadi, Ronald
Jurnal Latar Vol. 2 No. 1 (2024): Jurnal LATAR (Juni)
Publisher : Program Studi Arsitektur Universitas Nusa Nipa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69749/jl.v2i1.71

Abstract

Pekerjaan tambah mengakibatkan terjadinya perubahan terhadap item pekerjaan dan atau volume pekerjaan sehingga berdampak langsung terhadap biaya dan waktu. Tujuan penelitian ini untuk menganalisis dan mengetahui kesesuaian berdasarkan peraturan yang ada sehingga dapat memberikan solusi yang tepat mengenai permohonan pekerjaan tambah dari pihak kontraktor pada Proyek Perbaikan Akses Jalan di PLTD Waibalun Rayon Larantuka PT. PLN (Persero) Area Flores Bagian Timur. Penelitian ini menggunakan metode deskriptif kuantitatif dan deskriptif kualitatif, dengan tahapan melakukan analisis terhadap permohonan pekerjaan tambah berdasarkan peraturan yang berlaku, analisis terhadap bobot pekerjaan yang telah dilaksanakan sampai dengan waktu pengajuan permohonan pekerjaan tambah, analisis perhitungan biaya dari permohonan pekerjaan tambah, dan membuat kesimpulan dan saran dengan membandingkan keputusan yang telah dilaksanakan pihak konsultan pengawasan dengan hasil analisis pada artikel ini. Hasil analisis didapatkan kontrak yang digunakan merupakan jenis kontrak lump sum, deviasi antara rencana progres dan realisasi progres dari kontraktor sangat rendah dengan deviasi -11,1271 %, biaya pekerjaan tambah sebesar Rp.21.887.000,- dengan persentase total penurunan harga adalah 1,22 % dari total harga penawaran. Keputusan yang tepat terkait adanya permohonan pekerjaan tambah ini adalah tidak disetujui untuk dilanjutkan prosesnya. Keputusan pihak konsultan pada saat proyek berlangsung telah sesuai dengan hasil analisis pada artikel ini.
Dampak Modifikasi Inlet Pipa terhadap Pengurangan Akumulasi Sludge dalam Oil Storage Tank Kurniawan, Kurniawan; Kartawidjaja, Maria Angela; Sukwadi, Ronald; Cahyono, Budi
Jurnal Ilmiah Universitas Batanghari Jambi Vol 24, No 2 (2024): Juli
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v24i2.5293

Abstract

PT. XYZ is a company that produces palm oil (CPO). In order to maintain the quality of sales, PT XYZ must be able to maintain the quality of what is stored in a storage tank called the Oil Storage Tank (OST). The aim of this research is to identify and analyze the factors that cause mutual problems in the quality of the bottom of the Oil Storage Tank (OST) and the most important thing is to reduce the pile of sludge that occurs due to the deposition process which cannot be recycled, thus causing a loss in the amount recorded in actually in the field when the Oil Storage Tank (OST) is washed. The more sludge deposits at the bottom of the tank, the higher the potential loss for the company. This research uses the PDCA (Plan, Do, Check, Action) method which based on the results of this research can reveal the impact of modifying the inlet pipe on the Oil Storage Tank (OST) on reducing the accumulation of sludge at the bottom of the Oil Storage Tank (OST) tank. The modification involves moving the pipe outlet to the middle of the bottom of the tank so that the sludge is distributed more evenly and makes it easier to suction when recycling it back to the processing process. As a result, the accumulation of sludge was reduced quite significantly from data from washing results in March 2023 of 23,430 kg and washing in January 2024 to 7,300 kg with a shelf life and total production of CPO (crude palm oil) stored in the Oil Storage Tank of around 20 thousand tons. over a period of 9 months.
Peningkatan Kapasitas Bandwidth Menggunakan Teknologi Dwdm Ciena 6500 pada Sistem Kabel Bawah Laut Sea-Us Iryanto, Mokhamad Trihandoyo; Kartawidjaja, Maria Angela
Abdimisi Vol. 6 No. 2 (2025): Abdimisi
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/abms.v6i2.48737

Abstract

This article discusses the process of increasing bandwidth capacity in the SEA-US submarine cable system using Dense Wavelength Division Multiplexing (DWDM) technology, specifically the Ciena 6500 device. DWDM technology enables simultaneous transmission of multiple optical signals within a single optical fiber, thereby enhancing network capacity without additional physical infrastructure. This study includes the stages of survey, installation, and testing of the device to ensure performance meets standards. The results show that the system was successfully upgraded with adequate technical parameters and without errors during the Integrated Test Set (ITS) testing. These findings demonstrate the effectiveness of DWDM technology in addressing the growing demand for bandwidth. Keywords: Bandwidth; DWDM; Ciena 6500; Submarine Cable, SEA-US
Co-Authors Adiguna, Brian Adyana, Gede Bagia Wijaya Alexander, Justin Ali, Puti Retno ALIWARGA, CINTHIA Aloysius Adya Pramudita Asmaralda, Naftalia Bachri, Karel Octavianus Bachtiar, Marsellinus Bellachintya Reira Christata budi Cahyono Catherine Olivia Sereati Christine Natalia Edmund, Kyle Enny Widawati Gideon Manalu, Ferry Rippun Goenawan, Stephanus Ivan Hendrik Yusmanto Hotma Antoni Hutahaean Inna Kholidasari Iryanto, Mokhamad Trihandoyo Jayawarsa, A.A. Ketut Julius Bata Kartika Suhada Kurniawan Kurniawan Mamok Andri Senubekti Marsellinus Bachtiar Marsellinus Bachtiar W Marvin Chandra Wijaya Melisa Mulyadi Muda, Yosef Norbertus Tembu Nova Eka Budiyanta Osmond, Edbert Rainisa Maini Heryanto Rexivio, Derys Christian Rizani, Miftahul Fahriyyah Rizki Surya Permana Ronald Sukwadi Ronald Sukwadi SANTOSO SANTOSO Silalahi, Agustinus Stania Vandika Stanislaus S. Uyanto Sutanto, Daniel Denis Theresia Ghozali TIrtaulima, Chelsea Naomi Trifenaus Prabu Hidayat Uyanto, Stanislaus Suryadi Veronica Windha Mahyastuty Vivi Arisandhy Wijayanti, Linda Yanto`, Budi Yunita, Ika