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All Journal Saintia Matematika SITEKIN: Jurnal Sains, Teknologi dan Industri Jurnal Sains Matematika dan Statistika Edumatsains Jurnal Ilmiah METHONOMI Sinkron : Jurnal dan Penelitian Teknik Informatika Jurnal Masharif al-Syariah: Jurnal Ekonomi dan Perbankan Syariah Desimal: Jurnal Matematika International Journal of Supply Chain Management JOURNAL OF SCIENCE AND SOCIAL RESEARCH MABIS: Manajemen dan Bisnis Jurnal Manajemen dan Bisnis MES: Journal of Mathematics Education and Science Jurnal Ilmiah Manajemen Kesatuan Jurnal Ilmiah Akuntansi Kesatuan Jurnal Penelitian Ekonomi Akuntansi (JENSI) ASSET: Jurnal Manajemen dan Bisnis Jurnal Suluh Pendidikan Journal of Research in Mathematics Trends and Technology Jurnal Ekonomi Bisnis, Manajemen dan Akuntansi (JEBMA) FARABI: Jurnal Matematika dan Pendidikan Matematika Jurnal Manajemen dan Bisnis International Journal of Educational Review, Law And Social Sciences (IJERLAS) International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) Jurnal Akutansi Manajemen Ekonomi Kewirausahaan (JAMEK) International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) MATHunesa: Jurnal Ilmiah Matematika Journal of Mathematics Technology and Education Journal of Management Analytical and Solution Asian Journal of Management Analytics ARZUSIN: Jurnal Manajemen dan Pendidikan Dasar Return : Study of Management, Economic and Bussines Multiverse: Open Multidisciplinary Journal International Conference on Health Science, Green Economics, Educational Review and Technology (IHERT) Innovative: Journal Of Social Science Research Enrichment: Journal of Multidisciplinary Research and Development Neraca: Jurnal Ekonomi, Manajemen dan Akuntansi Jurnal Arjuna : Publikasi Ilmu Pendidikan, Bahasa dan Matematika Alkhidmah: Jurnal Pengabdian dan Kemitraan Masyarakat Journal of Business Management Neraca Manajemen, Akuntansi, dan Ekonomi Cendikia Pendidikan Journal Business Administration (JBA): Entrepreneurship and Creative Indutry Journal Of Management Analytical and Solution (JoMAS) Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa
Parapat Gultom
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Analysis of Estimated Electricity Consumption of Medan City in 2024-2028 Using Fuzzy Mamdani Logic Gultom, Parapat; Thianujaya, Wendy
Journal of Research in Mathematics Trends and Technology Vol. 5 No. 1 (2023): Journal of Research in Mathematics Trends and Technology (JoRMTT)
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jormtt.v5i1.16869

Abstract

This research employs fuzzy linear programming with Mamdani fuzzy logic to predict electricity consumption in Medan City. Data from the Central Statistics Agency (BPS) for the years 2019-2023, including population, electricity customers, Gross Regional Domestic Product (PDRB), and electricity consumption, were analyzed quantitatively. Data processing involved fuzzification, rule formation, rule composition, and defuzzification, with simulations and testing conducted using MATLAB software. The research findings indicate a forecasting error rate of 1.514%, demonstrating effective performance in predicting electricity consumption. Elasticity analysis reveals that electricity consumption in Medan City is significantly influenced by PDRB, providing crucial insights for future energy planning.
Impact of Service Quality and Product Quality on Customer Loyalty Through Customer Satisfaction on UMKM in the Field Kota Medan Gultom, Parapat; Utari, Cutserly; Manalu, Mawar Winda
Journal Of Management Analytical and Solution (JoMAS) Vol. 4 No. 2 (2024): Journal Of Management Analytical and Solution
Publisher : TALENTA Publisher, Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jomas.v4i2.16578

Abstract

This study aims to determine and analyze the effect of service quality and product quality on customer loyalty through customer satisfaction in MSMEs in Medan City, namely in the coffee shop business. The research method used is a survey with data collection techniques using an online questionnaire which obtained a sample of 100 respondents through judgment sampling. The data in this study were analyzed using SmartPLS software. The results showed that service quality has no significant effect on customer loyalty, product quality has a significant effect on customer loyalty, service quality has a significant effect on customer satisfaction, product quality has a significant effect on customer satisfaction, customer satisfaction has a significant effect on customer loyalty, service quality through customer satisfaction has no significant effect on customer loyalty, product quality through customer satisfaction has a significant effect on customer loyalty.  
The Influence of Conflict Management, Employee Engagement, and Work-Life Balance on Productivity through Well-Being Saragih, Junawi Hartasi; Siahaan, Elisabet; Gultom, Parapat
Enrichment: Journal of Multidisciplinary Research and Development Vol. 2 No. 9 (2024): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v2i9.218

Abstract

This study analyzes the influence of conflict management, employee engagement, and work-life balance on employee productivity at BPS North Sumatra with employee well-being as a mediating variable. Using a quantitative approach, this study involved 111 BPS Sumatera Utara Province employees through total sampling. Data were collected through questionnaires and analyzed using Structural Equation Modeling (SEM). The results show that conflict management, employee engagement, and work-life balance positively and significantly influence employee productivity, both directly and through the mediation of employee well-being. Employee well-being effectively mediates the influence of all three independent variables on employee productivity. This study provides recommendations for improving employee productivity through effective conflict management, enhanced employee engagement, and optimization of work-life balance.
Analysis of Factors that Affect the Determination of the Rental Value of the Placement of an Automated Teller Machine in Medan City Sembiring, Erwandi Martinus; Siahaan, Elisabet; Gultom, Parapat
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 1 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i1.349

Abstract

A prevailing phenomenon indicates that government appraisers at the State Asset and Auction Service Office (KPKNL) in Medan still employ conventional methods for the rental valuation of Automated Teller Machine (ATM) placements. This practice contradicts the Decree of the Director General of State Assets Number 547/KN/2022, which mandates the use of the Valuation Component and Survey List (DKPS) model through a desktop valuation approach. Addressing this discrepancy, this study aims to analyze the factors that influence the determination of ATM placement rental values in Medan City, thereby providing a basis for the development of a more objective valuation model.This research utilizes a quantitative approach with multiple regression analysis to identify the influence of variables such as distance to the Central Business District (CBD), transaction year, leased object type, ATM space type, lease period, accessibility, and area designation. The findings reveal that distance to the CBD has a significant negative effect on rental value. Conversely, transaction year, the type of leased object, space type, lease period, and designation as a shopping center or public service area exhibit a positive and significant influence. While accessibility and road type showed a positive correlation, their effects were not statistically significant. The resulting regression model achieved an R-squared value of 96.37%, demonstrating its excellent capability in explaining the variance in rental values.These findings provide a robust empirical foundation for government appraisers to transition to the regulated desktop valuation method. Moreover, the results offer critical insights for ATM owners in optimizing location selection. This study recommends that the significant factors identified be integrated into the DKPS model to enhance the accuracy, efficiency, and consistency of ATM rental valuations at KPKNL Medan, ultimately supporting the financial performance of asset owners.
Spatial Regression Analysis of Environmental and Structural Factors Influencing Shophouse Values in Makassar City, Indonesia Najang, Abdullah; Gultom, Parapat; Octavianus, Handy
Asian Journal of Management Analytics Vol. 3 No. 4 (2024): October 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/ajma.v3i4.11866

Abstract

This study investigates the factors that influence shophouse values in Makassar City, Indonesia, using a spatial regression model. The research addresses the lack of prior studies that consider spatial dependencies in property value assessments. By analysing data from 101 shophouses across four distinct city strata, factors such as building area, certificate type, and road width were found to significantly impact property values. Additionally, spatial relationships between neighboring properties were observed, indicating a 0.3 positive correlation. The study employed Structural Equation Modeling (SEM) with the R Project for Statistical Computing. The results provide insights into the spatial dynamics of urban property values, which are valuable for urban planners, investors, and policymakers aiming to optimize real estate development in rapidly growing urban centres.
Multi-objective vehicle routing problem with time windows via genetic algorithm Ketaren, Dahlia Rizky; Parapat Gultom; Mahyuddin K.M. Nasution
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/630swz39

Abstract

Efficient waste transportation requires route planning that considers time constraints, vehicle capacity, and road conditions. This study develops a Multi-Objective Vehicle Routing Problem with Time Windows model to optimize waste collection routes in Batu Bara Regency. The model simultaneously optimizes three objective functions: minimizing total travel distance, travel time, and risk based on road conditions. The solution is obtained using a Genetic Algorithm, with field data serving as model input. Simulation results show that the proposed model produces more efficient and realistic routes compared to conventional methods. The model effectively accommodates vehicle capacity constraints and customer service time windows. With the Genetic Algorithm, the solutions are not only operationally effective but also adaptable to the complex road network in the study area. These results can inform local government and waste management agencies in developing more adaptive and data-driven routing strategies, leading to cost savings, improved service efficiency, and reduced environmental impact. Moreover, the model can be extended or customized for other public logistics problems, such as food distribution or emergency response in semi-urban areas with similar infrastructure constraints. Future research can enhance this model by incorporating dynamic traffic data, multi-depot scenarios, or integrating sustainability metrics such as fuel consumption and emissions.
PENGARUH SISTEM INFORMASI MANAJEMEN DAN LINGKUNGAN KERJA TERHADAP KINERJA TENAGA KEPENDIDIKAN PADA UNIVERSITAS KATOLIK SANTO THOMAS Situmorang, Theresa Sisilia; Gultom, Parapat
Jurnal Manajemen dan Bisnis Volume 24 No. 1 Tahun 2024
Publisher : UNIKA Santo Thomas

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study entitled "The Influence of Management Information System and Work Environment on Educational Staff Performance at University of Saint Thomas Sumatera Utara". The purpose of this study was to determine the effect of Management Information System and Work Environment on Educational Staff Performance. This research method is descriptive research, hypothesis testing using multiple regression analysis. Data processing is done using SPSS. The population in this study were 78 educational staffs. In this study, sampling using the slovin formula, the number of samples in this study was 42 people. Based on the F test, it is known that the influence of the management information system and work environment on the performance seducational staff, together has a significant effect on the performance of staff. Based on the t test, it is known that the management information system has a positive and significant effecton the performance of educational staff and work environment has a positive and significant effecton the performance of educational staff. Based on the results of multiple linear regression, it is known that the variable that has the greatest influence on the performance of educational staff University Saint Thomas, Sumatera Utara is the work environment, which is 16,8 percent.
THE INFLUENCE OF PRICE AND SHOPPING CONVENIENCE ON ONLINE PURCHASE DECISIONS OF STUDENTS OF THE FACULTY OF COMPUTER SCIENCE, SANTO THOMAS CATHOLIC UNIVERSITY ON THE E-COMMERCE SHOPPE Bangun, Yohana; Gultom, Parapat
Jurnal Manajemen dan Bisnis Volume 24 No. 1 Tahun 2024
Publisher : UNIKA Santo Thomas

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In the current era of globalization, the internet is increasingly sophisticated and continues to develop, especially in the field of marketing, both in national and international markets. This competition is coupled with selectiveness. Companies must be able to communicate their products to consumers in selecting products for consumption. Under conditions like this, companies must be responsive to consumer desires. One of the popular e-commerce sites in Indonesia is Shopee.co.id. In this research, the independent variables are price (X1) and convenience (X2), while the dependent variable is the online purchasing decision (Y). This research aims to determine and analyze the influence of price and shopping convenience on online purchasing decisions of students from the Faculty of Computer Science at the E-Commerce Shoppe. The type of research used is quantitative research. The data processed is the result of distributing questionnaires to students of the Faculty of Computer Science at events using Google Form. The number of samples that will be used is 86 students. The sampling technique is: accidental sampling. In analyzing the data, the instruments used are the validity test, reliability test, multiple linear regression equation, f test, t test, and coefficient of determination test. The results of this research show that the results of the multiple linear test show that price has a negative and significant effect , comfort has a positive and significant effect. significant to online purchasing decisions of St. Catholic University Computer Science students. Thomas at E-Commerce Shoppe purchasing decisions.
PENGARUH SISTEM INFORMASI MANAJEMEN DAN LINGKUNGAN KERJA TERHADAP KINERJA TENAGA KEPENDIDIKAN PADA UNIVERSITAS KATOLIK SANTO THOMAS Situmorang, Theresa Sisilia; Gultom, Parapat
Jurnal Manajemen dan Bisnis Volume 24 No. 1 Tahun 2024
Publisher : UNIKA Santo Thomas

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study entitled "The Influence of Management Information System and Work Environment on Educational Staff Performance at University of Saint Thomas Sumatera Utara". The purpose of this study was to determine the effect of Management Information System and Work Environment on Educational Staff Performance. This research method is descriptive research, hypothesis testing using multiple regression analysis. Data processing is done using SPSS. The population in this study were 78 educational staffs. In this study, sampling using the slovin formula, the number of samples in this study was 42 people. Based on the F test, it is known that the influence of the management information system and work environment on the performance seducational staff, together has a significant effect on the performance of staff. Based on the t test, it is known that the management information system has a positive and significant effecton the performance of educational staff and work environment has a positive and significant effecton the performance of educational staff. Based on the results of multiple linear regression, it is known that the variable that has the greatest influence on the performance of educational staff University Saint Thomas, Sumatera Utara is the work environment, which is 16,8 percent.
THE INFLUENCE OF PRICE AND SHOPPING CONVENIENCE ON ONLINE PURCHASE DECISIONS OF STUDENTS OF THE FACULTY OF COMPUTER SCIENCE, SANTO THOMAS CATHOLIC UNIVERSITY ON THE E-COMMERCE SHOPPE Bangun, Yohana; Gultom, Parapat
Jurnal Manajemen dan Bisnis Volume 24 No. 1 Tahun 2024
Publisher : UNIKA Santo Thomas

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In the current era of globalization, the internet is increasingly sophisticated and continues to develop, especially in the field of marketing, both in national and international markets. This competition is coupled with selectiveness. Companies must be able to communicate their products to consumers in selecting products for consumption. Under conditions like this, companies must be responsive to consumer desires. One of the popular e-commerce sites in Indonesia is Shopee.co.id. In this research, the independent variables are price (X1) and convenience (X2), while the dependent variable is the online purchasing decision (Y). This research aims to determine and analyze the influence of price and shopping convenience on online purchasing decisions of students from the Faculty of Computer Science at the E-Commerce Shoppe. The type of research used is quantitative research. The data processed is the result of distributing questionnaires to students of the Faculty of Computer Science at events using Google Form. The number of samples that will be used is 86 students. The sampling technique is: accidental sampling. In analyzing the data, the instruments used are the validity test, reliability test, multiple linear regression equation, f test, t test, and coefficient of determination test. The results of this research show that the results of the multiple linear test show that price has a negative and significant effect , comfort has a positive and significant effect. significant to online purchasing decisions of St. Catholic University Computer Science students. Thomas at E-Commerce Shoppe purchasing decisions.
Co-Authors Abdul Munif Afryantika Pratiwi Aghni Syahmarani Akbar, Andini Alya Nadhira Nur Amanda, Ade Siti Andre Masago Manik Angginun Juwita Sari Anggita Rizki Defiani Hasibuan Apriliza, Yafika Arlina Nurbaity Lubis Asima Manurung Asima, Asima Azwar, Nurul Azri Azzahra, Firza Bangun, Yohana Beby Karina Fawzeea Sembiring Binsar Nommensen Hasiolan Nababan Br Ginting, Emmita Br Manalu, Chairi Indani Chairi Indani Br Manalu Dalimunthe, Ritha F. Deby Nanda Sari Dian Natari Dwi Nurul Aisyah Eko Syafriadi Elikson Damanik Elisabet Siahaan Elly Rosmaini Elvin Juliani Gulo Endang Sulistya Rini Esther S. M. Nababan Esther SM Nababan Eunike Al Grea Ezra, Posman Febriani Safitri Felly Ardan Fitria Khairani Ginting, Jean Probosky Ginting, Yoga Gilbert Halasan Sirait Hardiansyah Hardiansyah Hartini Pratiwi Pane Hasibuan, Gamal Ali Akbar Hasibuan, Syarinah Junianti Hulu, Gracelin Nonifati Indah Permata Sembiring Indris Simanungkalit Irmayanti Nasution Iskandar Situmorang Ismail Napitupulu Jefri Leo Jonathan Liviera Marpaung Ketaren, Dahlia Rizky Khairunnisa Br Manurung Komarudin Komarudin Kristian, Abel Kurniasari, Rini Lestari, Nanda Loebis, Roma Ayni A. Mahyuddin K.M. Nasution Manalu, Mawar Winda Manulang, Dea Lonita Mardiningsih Mardiningsih Mardiningsih Maris Stella Sitorus Marpaung, J.L. Matriadi, Faisal Mey Ramayanti Tinambunan Mhd Diky Setiawan Mhd Reza Irjaldi Hasibuan Miftah Khairani Mindasari, Eva Miranda Moudy Fitria Respati Mulyadi Mardiyos, Roy Nababan, ESM Nababan, Esther S.M. Nababan, Esther Sorta Mauli Nabilah Faisal, Ananda Najang, Abdullah Natalia, Desy Denada Nazli Ramadhani Lubis Novi Yanti Nur Amalia, Syahamah Nurbaity Lubis, Arlina Octavianus, Handy Oka Simatupang Open Darnius paham ginting Paskah Riny Sirait Pratiwi, Annisa Rizki Prihatin Lumbanraja Pujiana, Perli Purba, Titin Miduk Putra, Ramadhan Diansyah Putri Khairiah Nasution Rahmadhina, Namira Mudrikah Rajagukguk, Angie Maretha Ramadhani Fitri Rina Br. Bukit Rita F. Dalimunthe Ritha F. Dalimunthe Ritha F.Dalimunthe Ritonga , Ewy Lady Christin Robby Oksa Cornely Ronny Sung RS, Yoppy Mairizon Ruslin Chaerul Cora Sabariah Sabariah Safira, Moza Sambas Ade Kesuma Saragih, Junawi Hartasi Sarah Madaniah Sartika Ningsih Sawaluddin Sawaluddin Sawaluddin Sawaluddin Sawaluddin, Sawaluddin Sembiring, Erwandi Martinus Sentosa, Ilham Shabrina Tifani Shafira, Meifanny Azri Siagian, Riris Regita Cahyani Siahaan, Elisabet Simanjuntak, Rahmad Simbolon, Miranda Melania Nathasia Sinaga, Hasanah Dwi Putri Sinurat, Rona Lamretta Sipayung, Aquinaldo Boyfame R. Sirait, Annisa Hidayati Siregar, Ahir Diana Putri Siregar, Dwi Faradiba Sitepu, Lia Eriska Br Siti Nurhaliza Siti Raha Agoes Salim Sitompul, Weny Grace Situmorang, Theresa Sisilia Sonya Putri Suherwin Suherwin Sukaria Sinulingga Suryati Sitepu Sutarman Sutarman Sutarman Sutarman Suyanto Suyanto Suyanto Suyanto Suyanto Syafriadi, Eko Syahputra, Muhammad Romi Syahrika Luthfi Syahriol, Syahriol T Khairunnisa Tambunan, Gilbert Pauly Hamonangan Tarigan, Miska Irani Tata Winda Lesmana Thianujaya, Wendy Thianujaya, Wendy Thianujaya Tulus Utari, Cutserly Weber, Gerhard Wilhelm Wibisono Wibisono Widyasari, Rina Wulandari, Annisa yeni absah Yohanna Yunitha Simangunsong