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Purbanuara Parlindungan Sitorus
Institut Transportasi Dan Logistik Trisakti
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Analisis Pengendalian Kualitas Part In House Box Fuel Inlet Pada Proses Stamping Dengan Menggunakan Metode Six Sigma Untuk Mengurangi Biaya Rantai Pasok (Studi Kasus PT. DPM) Purnamasari, Hylda Kusuma; Poncotoyo, Wahyu; Sitorus, Purbanuara Parlindungan
Jurnal Sistem Transportasi & Logistik Vol. 4 No. 2 (2024): Desember
Publisher : Institut Transportasi dan Logistik Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54324/jstl.v4i2.2413

Abstract

PT. DPM is a manufacturing company engaged in the production of bodies, motorcycle spare parts (2 wheels) and cars (4 wheels). The company handles several types of parts on cars focused on the stamping area, in this study analyzing part quality control in the Box Fuel Inlet sub-group. During the production process there are known problems, namely the existence of defects or defects in the accuracy of clearance or gaps. This shows that the quality of goods is not optimal in the Box Fuel Inlet sub-group. For this reason, it is necessary to carry out an analysis of quality control in order to be able to reduce the number of defects or to produce zero defects. The method used in this study uses Six Sigma with DMAIC (Define, Measure, Analyze, Improve and Control) stages and to determine critical points or failure modes with the highest risk value to provide recommendations or recommended actions. The results showed that the highest defect was found in the D30 Fuel Inlet Box with a total defect of 31 pcs. The Capability Process (CP) calculation shows that the three Box Fuel Inlet sub-groups are below the normal limit
Analisis Perencanaan Rute Distribusi Beras Premium Menggunakan Metode Vehicle Routing Problem Dengan Algoritma Tabu Search Azizi, Dimas Akbar; Sholihah, Sita Aniisah; Sitorus, Purbanuara Parlindungan
Jurnal Sistem Transportasi & Logistik Vol. 4 No. 3 (2025): April
Publisher : Institut Transportasi dan Logistik Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54324/jstl.v4i3.2419

Abstract

PT. X focuses on warehousing logistics, transportation, and pest eradication services. In the distribution of rice, PT. X hands over to its subsidiary engaged in transportation services. The subsidiary of PT. X has problems faced, namely the number of varied delivery destinations, different requests for each customer and route determination still relying on the experience of the driver. Therefore, this research was conducted to determine the optimal route in delivery, by minimizing the total distance traveled, calculating the total minimum cost resulting from the calculation of the Tabu Search Algorithm. The results of the study, the total distance on the company's initial 4 routes amounted to 372.6 Km and the overall initial cost of 4 routes incurred by the company amounted to Rp. 1,654,244. After using the Tabu Search Algorithm, 3 new route proposals were generated amounting to 298.5 Km and the overall cost for 3 routes was Rp. 1,339,223 which means getting a distance savings of 74.1 Km and shipping cost savings of Rp. 315,021. The route results obtained using the Tabu Search Algorithm are, Route 1: (0-C4-C60) with a distance of 45.8 Km, route 2: (0-C1-0) with a distance of 85 Km, route 3: (0-C3-C5-C2-0) with a total distance of 167.7 Km.
Analisis Pengendalian Persediaan Raw Material Untuk Meningkatkan Efisiensi Produksi Hand Stand Mixer Pada Pt Blue Gas Indonesia Dengan Metode Material Requirement Planning (MRP) Puspita, Sesaria Mardhiani Rachma; Sitorus, Purbanuara Parlindungan; Theresia, Noviana Marianti
Jurnal Sistem Transportasi & Logistik Vol. 3 No. 3 (2024): April
Publisher : Institut Transportasi dan Logistik Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54324/jstl.v3i3.2441

Abstract

PT. Blue Gas Indonesia is a company engaged in sales, distribution, gas refiling and assembling. This company also has a household equipment production and assembly business unit under the Vienta trademark and markets Blue Gas and Vienta kitchen equipment products such as Hand Stand Mixers. This company has a problem, namely PT. Blue Gas Indonesia still uses a manual system to plan Raw materials for making handstand mixers. This can cause problems, such as frequent calculation errors when Raw material stock is too small, resulting in the production process being hampered. Therefore, this research aims to find out the optimal quantity of Raw material needed and to know when to place a new order using the MRP Method, Lot For Lot-for-lot technique, Economic Order Quantity, and Period Order Quantity. The results of the research produced From the results of analysis using the Material Requirement Planning method by calculating Lot Sizing using three techniques, namely Lot For Lot, Economic Order Quantity, and Periodic Order Quantity on Raw materials for Hand Stand Mixer products, it can be concluded that the lotting or lot-sizing technique costs money. The minimum inventory for almost all Raw materials is the Lot For Lot technique with a total inventory cost of IDR 4.422.348.978,59.
Behaviour and Satisfaction Effects on User Loyalty within e-Procurement of National Oil Firms Parlindungan, Purbanuara; Sanny, Lim; Sholihah, Sita Aniisah; Nofrisel , Nofrisel; Zaroni , Zaroni
Studi Akuntansi, Keuangan, dan Manajemen Vol 5 No 2 (2025): Oktober
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/sakman.v5i2.5524

Abstract

Purpose: This study aims to analyze the effects of Application Ease of Use, Digital Service Quality, and Digital Information Quality on User Behavior, User Satisfaction, and User Loyalty in National Upstream Oil and Gas Companies. It also examines the mediating roles of User Behavior and User Satisfaction in influencing loyalty. Research Methodology: A quantitative approach was used with the SmartPLS 4 analysis tool to analyze the data. Data were collected from 296 respondents across 15 upstream oil and gas companies in Indonesia, selected through purposive sampling based on Slovin’s formula. The analysis employed the Structural Equation Modeling (SEM-PLS) technique to test the direct and indirect effects of the study variables. Results: The findings revealed that Ease of Use and Digital Service Quality significantly influenced both user behavior and satisfaction. Digital Information Quality does not significantly affect User Behavior but has a strong impact on User Satisfaction. Furthermore, User Behavior and User Satisfaction significantly enhance User Loyalty, confirming their mediating roles. Conclusions: Ease of Use and Service Quality are critical determinants of user engagement and loyalty, whereas Digital Information Quality primarily strengthens satisfaction. Limitations: This study focused only on upstream oil and gas companies in Indonesia and used cross-sectional self-reported data, which may limit causal interpretation. Contribution: This study enriches digital loyalty theory by highlighting how behavioral and satisfaction factors mediate the impact of digital quality dimensions on user loyalty in industrial digital systems.
User Satisfaction Mediates Ease of Use and Loyalty in Hulu Migas E-Procurement Parlindungan, Purbanuara; Sanny, Lim; Zaroni , Zaroni; Sholiha, Sita Anisah
Studi Akuntansi, Keuangan, dan Manajemen Vol 5 No 2 (2025): Oktober
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/sakman.v5i2.5632

Abstract

Purpose: This study investigates how Ease of Use in an e?procurement system impacts User Loyalty within a national upstream oil and gas company, with User Satisfaction serving as a mediating factor. The aim is to clarify the indirect effect of system usability on loyalty by evaluating the mediation pathway through satisfaction Methodology: Employing a quantitative approach, data were collected from 296 e?procurement users across 15 national hulu migas companies using structured surveys. Responses were analyzed using Structural Equation Modeling (SEM) via SmartPLS 4 Results: The study found that ease of use significantly impacts user satisfaction (? = 0.779, p < .000) and user loyalty (? = 0.293, p < .000), with user satisfaction mediating the relationship between ease of use and loyalty (indirect effect = 0.537, p = .000). These results align with recent research indicating that ease of use enhances user satisfaction and loyalty, with satisfaction serving as a mediator in this relationship. Conclusions: Ease of use significantly effect on user satisfaction and loyalty. User satisfaction has positive and significant mediating ease of use and loyalty. Limitations: The study does not account for variations across different platforms or consider deeper system factors such as security, technical complexity, and usability challenges—issues highlighted in the literature as significant barriers to e-procurement adoption Contribution: This Research contributes to both management practice and academic understanding by showing that improving system usability can enhance loyalty through user satisfaction—offering a clear direction for strategic enhancements in e?procurement platforms.
Website Quality and Personal Branding: Drivers of Satisfaction and Purchase Decision Lestari, Novia Indah; Sofiati, Nunung Ayu; Parlindungan, Purbanuara; Purwoko, Harry; Wijayanthi, Ida Ayu Trisna
Jurnal Ilmiah Manajemen Kesatuan Vol. 13 No. 6 (2025): JIMKES Edisi November 2025
Publisher : LPPM Institut Bisnis dan Informatika Kesatuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37641/jimkes.v13i6.4193

Abstract

Digital transformation in commerce has shifted consumer behavior, making website quality and personal branding central factors in shaping customer satisfaction and purchase decisions. While prior studies often analyze these elements separately, limited research has integrated them into a unified framework to explain how digital experiences influence consumer outcomes. This study aims to examine the effects of website quality and personal branding on purchase decisions, with customer satisfaction as a mediating variable. The research adopts a quantitative approach using Partial Least Squares Structural Equation Modeling (PLS-SEM). Data were collected through an online survey of 160 respondents who had prior experience with e-commerce platforms, and the model was tested using SmartPLS with bootstrapping techniques. Findings reveal that website quality positively affects both customer satisfaction and purchase decision, while personal branding significantly influences satisfaction but does not directly impact purchase decision. Moreover, customer satisfaction strongly mediates the relationship between website quality, personal branding, and purchase decision. The study highlights the dual importance of technical excellence and authentic personal branding in fostering satisfaction and driving consumer behavior. The results provide theoretical insights for digital commerce research and practical guidance for businesses to enhance consumer trust, engagement, and purchase outcomes.
The Mediating Role of Online Tracking in the Relationship Between Delivery Timeliness and Customer Satisfaction in E-Commerce Sirait, David Pandapotan; Sitorus, Marthaleina Ruminda; Lermatan, Esterlinus Edwin; Pratiwi, Sekar Widyastuti; Parlindungan, Purbanuara
Dinasti International Journal of Management Science Vol. 7 No. 3 (2026): Dinasti International Journal of Management Science (January - February 2026)
Publisher : Dinasti Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/dijms.v7i3.6239

Abstract

This study aims to analyze the determinants of customer satisfaction in the e-commerce landscape by examining the roles of timeliness of delivery and online tracking. In a competitive market, customer satisfaction has become a crucial indicator of success, where logistics and supply chain management play a central role. This research proposes and tests a mediation model where online tracking is hypothesized to mediate the relationship between timeliness of delivery and customer satisfaction for Shopee Indonesia users. Using a quantitative approach, data were collected through a survey of 150 Shopee consumers in Indonesia and analyzed using Partial Least Squares - Structural Equation Modeling (PLS-SEM). The results confirm that all four proposed hypotheses were accepted. The findings indicate a significant positive influence of timeliness of delivery on both online tracking and customer satisfaction. Online tracking also has a strong positive effect on customer satisfaction. Crucially, the study validates that online tracking acts as a significant mediator in the relationship between timeliness of delivery and customer satisfaction. These findings imply that e-commerce platforms must prioritize both the reliability of delivery and the transparency of the tracking process to enhance overall customer satisfaction.
Co-Authors Antonius, Sulistiyono Aradena, Athallah Aqil Ghani Halim Ardhya Ekawati, Dian Azizi, Dimas Akbar Bijaksana, Gena Chamsudi, Danie Hayam Mada Dinar Dewi Kania Fachrurozy, Rayhan Adzikra Fadillah, Ridho Rizky Fadzrin, Havid Lucky Febriansyah, Rizky Firmansyah, Iqbal Irenita, Novembria Jonathan Jonathan Kharisma, Alvian Farisqi Dwi Larasati, Kinanthi Lermatan, Esterlinus Edwin lim Sanny, lim Marthaleina Ruminda Sitorus Nofrisel , Nofrisel Novia Indah Lestari Nunung Ayu Sofiati (Efi) Olghatra Putra Yohanes Poncotoyo, Wahyu Pratiwi, Sekar Widyastuti Purnamasari, Hylda Kusuma Purwoko, Harry Purwoko, Harry Puspita, Sesaria Mardhiani Rachma Rahfi, Muhamad Sauqi Salsa Bila, Nurul Aulia Sholiha, Sita Anisah Sholihah, Sita Aniisah Sholihah, Sita Anlisah Situmorang, Johan Kiara Sri Handayani Sri Rahardjo Suryobuwono, Abdullah Ade Tantry, Francis Theresia, Noviana Marianti WIjayanthi, Ida Ayu Trisna Yana Tatiana, Yana Yulianti Keke Zaroni , Zaroni