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All Journal dCartesian: Jurnal Matematika dan Aplikasi Journal Social Science And Technology For Community Service Jurnal Informatika dan Rekayasa Perangkat Lunak
Langi, Yohanes Andreas Robert
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics

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OPTIMASI PEMBAGIAN TUGAS KARYAWAN PADA BENGKEL INDOMOBIL NISSAN DATSUN KOMBOS DENGAN MENGGUNAKAN METODE HUNGARIAN Sari, Dewi Permata; Paendong, Marline Sofiana; Langi, Yohanes Andreas Robert
d'CARTESIAN:Jurnal Matematika dan Aplikasi Vol 9, No 2 (2020): September 2020
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1302.576 KB) | DOI: 10.35799/dc.9.2.2020.29186

Abstract

Sumber Daya Manusia adalah salah satu faktor yang sangat penting bahkan tidak dapat dilepaskan dari sebuah organisasi, institusi maupun perusahaan. Sumber Daya Manusia juga merupakan usaha yang dituntut kemampuannya dalam meningkatkan efisiensi dan mengefektifkan penggunaannya sehingga Sumber Daya Manusia merupakan kunci yang menentukan berkembangnya suatu perusahaan. Dalam Bengkel Indomobil Nissan Datsun Kombos, jenis pekerjaan yang dilakukan oleh karyawan berbeda-beda dikarenakan tingkat kemahiran atau produktifitasnya. Tujuan penelitian  untuk mengetahui pembagian tugas karyawan pada Bengkel Indomobil Nissan Datsun Kombos sehingga mendapat waktu kerja yang optimal. Metode Hungarian dapat digunakan untuk mengetahui pembagian tugas karyawan sehingga mendapat waktu kerja yang optimal. Hasil pembagian tugas karyawan yang diperoleh dengan metode Hungarian jika dibandingkan dengan penempatan karyawan sebelumnya menunjukkan adanya efisiensi waktu sebanyak 191.4 menit per setiap 5 pekerja melakukan 5 pekerjaan. 
Community Service Program: Enhancing Church Communication through Website Development Training for GMIM Bait-El Kamasi and Bait-Lahim Langi, Yohanes Andreas Robert; Mongi, Charles Efraim; Widiana, Siska Ayu; Takaendengan, Mahardika Inra; Lapihu, Dodisutarma
Journal of Social Sciences and Technology for Community Service (JSSTCS) Vol 6, No 1 (2025): Volume 6, Nomor 1, March 2025
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jsstcs.v6i1.4770

Abstract

This paper discusses the development and implementation of a website for GMIM Bait-El Kamasi and GMIM Bait-Lahim Talete churches to address communication challenges faced by the congregation. The main problem identified was the reliance on in-person announcements and the unstructured use of social media, which limited access to important church information for members who could not attend services regularly. Based on interviews and surveys, 92% of the congregation expressed the need for a digital platform, with 85% believing it would improve information dissemination and engagement.The solution was to create a user-friendly website that provides real-time updates on worship schedules, announcements, and church activities. Additionally, the website includes a dedicated section for church history and prayer services. Church staff and youth representatives were trained to manage the website, ensuring ongoing content updates and technical maintenance. Regular evaluations will be conducted to assess the website’s effectiveness in improving church communication and participation.This project demonstrates the importance of integrating technology in church operations to enhance engagement and ensure accessibility. The website is expected to have a lasting impact by fostering a more connected church community and addressing the evolving digital needs of its members.
Design of Android-Based Food Ordering Information System at RM. Solideo Kuliner Pesik, Kevin Jeremi; Montolalu, Chriestie Ellyane Juliet Clara; Kalengkongan, Wisard Widsli; Lapihu, Dodisutarma; Soewoeh, Christian Alderi Jeffta; Langi, Yohanes Andreas Robert; Takaendengan, Mahardika Inra
Jurnal Informatika dan Rekayasa Perangkat Lunak Vol. 6 No. 3 (2025): Volume 6 Number 3 September 2025
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jatika.v6i3.308

Abstract

The culinary industry in Indonesia has experienced significant growth, yet many restaurants still rely on manual ordering systems. This study addresses the operational inefficiencies at RM Solideo Kuliner, where manual ordering causes long queues, order recording errors, and customer dissatisfaction. The research aims to design an Android-based online food ordering information system to overcome these challenges. The Agile methodology was employed for system development due to its flexibility in accommodating changing business requirements. Data collection involved interviews with restaurant stakeholders and direct observation of existing processes. The system was developed using Flutter framework and Dart programming language, with Firebase serving as the backend database. The resulting Android application enables customers to register, login as guests, browse menus, place orders, select payment methods, and track order status in real-time. Black Box testing confirmed that all features function according to specified requirements. Usability evaluation with 10 respondents yielded positive feedback, with 90% rating the application as easy to use and having an attractive interface. The implementation successfully improved operational efficiency by reducing order processing time by 60% and minimizing recording errors to less than 2%. This digital transformation demonstrates the potential for technology adoption in enhancing customer experience and business operations in the culinary sector.
Web-Based Healthcare Service System Development Using RAD Method for Community Health Center Efficiency Improvement Iroth, Nathanael Eliasher; Montolalu, Chriestie Ellyane Juliet Clara; Takaendengan, Mahardika Inra; Langi, Yohanes Andreas Robert; Kalengkongan, Wisard Widsli; Lapihu, Dodisutarma
Jurnal Informatika dan Rekayasa Perangkat Lunak Vol. 7 No. 1 (2026): Volume 7 Number 1 March 2026
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jatika.v7i1.1606

Abstract

This research aims to design and develop a healthcare service website for Puskesmas Modoinding to improve efficiency and accessibility of public health services. Previously, information delivery including doctor schedules, service types, operating hours, and patient registration was conducted manually, often causing delays and limited information distribution. The system was developed using the Rapid Application Development (RAD) method, comprising four phases: requirements planning, system design, development, and implementation. Data collection employed interviews, observation, and literature study with 12 stakeholders (10 patients, 2 administrators). The website was built using HTML, CSS, JavaScript, PHP, and MySQL database. Black Box Testing demonstrated 100% success rate across 28 test scenarios covering admin and patient interfaces. System Usability Scale (SUS) evaluation yielded average scores of 85.5 for patients and 87.5 for administrators, both exceeding the 'Very Good' threshold of 80. Ten core features were successfully implemented including online registration, queue status checking, and administrative data management. The developed website enables community members to access healthcare information remotely without physical visits, reducing average registration time by approximately 40%. This research concludes that web-based healthcare systems using RAD methodology can significantly improve service efficiency at community health centers while meeting user requirements and usability standards.
Pemodelan Dinamika Sentimen Publik dalam Gerakan 17+8 Tuntutan Rakyat di X dengan Rantai Markov Diskrit Sukarame, Rilya Livi; Langi, Yohanes Andreas Robert; Nainggolan, Nelson
d'Cartesian Vol. 15 No. 1 (2026): Maret 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/dc.15.1.2026.67073

Abstract

Percakapan publik mengenai gerakan 17+8 Tuntutan Rakyat di media sosial X menunjukkan dinamika sentimen yang berubah dari waktu ke waktu. Penelitian ini memodelkan transisi sentimen tersebut menggunakan Rantai Markov Diskrit. Sebanyak 798 tweet periode 25 Agustus-05 September 2025 diklasifikasikan ke dalam tiga kategori (positif, netral, negatif) menggunakan InSet Lexicon. Distribusi awal didominasi sentimen negatif sebesar 87.59%. Matriks peluang transisi menunjukkan kecenderungan sentimen bertahan dan berpindah menuju kategori negatif. Distribusi steady state menghasilkan peluang negatif 0.875784, positif 0.087829, dan netral 0.036386. Hasil ini menunjukkan bahwa dalam jangka panjang sentimen publik cenderung stabil dengan dominasi sentimen negatif.
Co-Authors Dewi Permata Sari Iroth, Nathanael Eliasher Lapihu, Dodisutarma Marline Paendong Mongi, Charles Efraim Montolalu, Chriestie Ellyane Juliet Clara NELSON NAINGGOLAN Pesik, Kevin Jeremi Siska Ayu Widiana Soewoeh, Christian Alderi Jeffta Sukarame, Rilya Livi Takaendengan, Mahardika Inra Wisard Widsli Kalengkongan