Vol. 14 No. 1 June 2023 ComTechComTech Computer, Mathematics and Engineering Applications P-ISSN: 2087-1244 E-ISSN: 2476-907X Editor in Chief Evaristus Didik Madyatmadja Bina Nusantara University, Indonesia Managing Editors Noerlina Bina Nusantara University, Indonesia International Editor Board Aminul Islam Technical University of Denmark (DTU), Denmark Bernardo Nugroho Yahya Hankuk University of Foreign Studies, South Korea Irwanda Laory University of Warwick, U.K Mahardhika Pratama University of South Australia, Australia Muhammad Syafrudin Sejong University, South Korea Natanael Karjanto Sungkyunkwan University, South Korea Nico Surantha Tokyo City University, Japan Wahyu Caesarendra Universiti Brunei Darussalam, Brunei Darussalam Yogi Ahmad Erlangga Zayed University, United Arab Emirates Leon A. Abdillah Bina Darma University, Indonesia Fergyanto E. Gunawan Bina Nusantara University, Indonesia Language and Layout Editor Eka Yanti Pangputri Bina Nusantara University, Indonesia Dina Nurfitria Bina Nusantara University, Indonesia Shavira Sarashita Bina Nusantara University, Indonesia Holil Bina Nusantara University, Indonesia Atmawati Bina Nusantara University, Indonesia Secretariat Dewi Novianti Bina Nusantara University, Indonesia Description ComTech is a biannual journal, published in June and December. ComTech is an interdisciplinary and open access journal covering Computer, Mathematics, and Engineering Applications. ComTech has been accredited by DIKTI under the decree number 3/E/KPT/2019 (SINTA 2) and indexed by CrossRef, ASEAN Citation Index, Directory of Open Access Journals (DOAJ), Science and Technology Index 2 (SINTA 2), Garda Rujukan Digital (Garuda), Indonesia OneSearch, Google Scholar, Academic Resource Index (ResearchBib) and Indonesian Research Repository (Neliti). Research and Technology Transfer Office, Bina Nusantara University, Anggrek Campus, Jl.Kebon Jeruk Raya 27, Kebon Jeruk, Jakarta Barat 11530, Tel. +621-5350660 ext. 1705/1708, Fax.+621-5300244, E-mail: comtech@binus.edu, Website: https://journal.binus.ac.id/index.php/comtech, FB: https:// www.facebook.com/ComTechBinus Vol. 14 No. 1 June 2023 TABLE OF CONTENTS Wigbertus Ngabu, Henny Pramoedyo, Rahma Fitriani, and Ani Budi Astuti Spatial Modeling of Fixed Effect and Random Effect with Fast Double Bootstrap Approach............................ 1−9 Muhammad Iqbal and Syahril Efendi Data-Driven Approach for Credit Risk Analysis Using C4.5 Algorithm............ ........................................... 11−20 Agus Puji Prasetyono, Aan Yudianto, and I Wayan Adiyasa Lightweight Design and Finite Element Analysis of Brake Lever for Motorcycle Application....................... ..... 21−32 Devie Rosa Anamisa, Achmad Jauhari, and Fifin Ayu Mufarroha K-Nearest Neighbors Method for Recommendation System in Bangkalan’s Tourism....................................... 33−44 Paduloh and Taufik Djatna A Robust Optimizing Reverse Logistics Model for Beef Products Using Multi Depot Vehicle Routing Problem......... 45−54 Nurfitri Imro’ah, Nur’ainul Miftahul Huda, and Abang Yogi Pratama The Implementation of Control Charts as a Verification Tool in a Time Series Model for COVID-19 Vaccine Participants in Pontianak................ ................................................................................ 55−67 ComTechComTech Computer, Mathematics and Engineering Applications P-ISSN: 2087-1244 E-ISSN: 2476-907X