Article Per Year (5 Year)
p-Index From 2021 - 2026
1.182
P-Index
This Author published in this journals
All Journal Jurnal Ekonomi Manajemen Sistem Informasi Dinasti International Journal of Education Management and Social Science Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) Jurnal Sistem Transportasi & Logistik
Subastian, Djamal
Unknown Affiliation
Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Transportation Other

Published : 7 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 7 Documents
Search

 1 
Business Strategy to Achieve the Target Time of Laytime Allowed for Coal Commodities Subastian, Djamal; Anindya, Badzlina; Najoan, Denny J.; Farisyi, Sofwan; Ichwan, Gema Akbar
Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) Vol. 12 No. 2 (2025): Juli
Publisher : Institut Transportasi dan Logistik Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54324/j.mtl.v12i2.1787

Abstract

For the logistics process, the company needs to pay attention to the loadings process to achieve the laytime that has already been agreed between the parties. In the logistics process, the company often gets the problem which is not an accordance mismatch between the plan and actual in the process of coal loading. As a result, the company must pay demurrage due to the laytime used for the loading process over the laytime allowed. This research aims to determine a business strategy to achieve the target laytime of the coal loadings. This author used SWOT analysis for this research by analyzing external factors and internal factors. The author uses descriptive qualitative analysis as a data analysis method. The result of this strategy formulation is backward integration. The author used matrix IFE EFE and matrix SWOT as tools for making strategies.  The implementation is the company needs to acquire a jetty around the coal mine by using the profit from increasing profit so that the coal in the stockpile can accommodate large amounts of the coal and can be distributed quickly.
Evaluasi Efektivitas Manajemen dan Rekayasa Lalu Lintas Pada Simpang Asemka Dalam Rangka Mendukung Kebijakan Low Emission Zone Kota Tua Jakarta Barat Subastian, Djamal; Suryobuwono, Abdullah Ade; Agustin, Arneta
Jurnal Sistem Transportasi & Logistik Vol. 2 No. 2 (2022): Desember
Publisher : Institut Transportasi dan Logistik Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54324/jstl.v2i2.2442

Abstract

The Low Emission Zone policy in the Kota Tua tourist area is carried out by carrying out traffic engineering at the Asemka intersection which is the meeting place of Jl. Pintu Besar Selatan (south approach), Jl. Pintu Besar Utara- Jl. St. Kota (north approach), Jl. Jembatan Batu (east approach), and Jl. Fly Over Pasar Pagi and Jl. Asemka (western approach). After the implementation of traffic engineering, it is necessary to analyze how the performance of the intersection is to determine the impact of diverting traffic flow from several roads. The method used in this study is MKJI 1997 to determine the performance of road sections manually and PTV Vissim which is a microsimulation software to determine the performance of intersections, from both methods the parameters obtained from the research results are almost close. From the analysis results obtained speed 54.81 km/hour, delay 72.11 seconds, the vehicle stopped 2.7 seconds/pcu with level of service F, from the simulation results obtained speed 53.25 km/hour, delay 37.26 seconds, vehicle stopped 1.43 seconds/pcu with level of service D, the difference from the calculation results is below 5% with the information received.
Terminal Safety and Security as an Implication of Terminal Location and Accessibility, Mediated by Service Reliability: A Case Study at Tanah Merdeka Freight Terminal Widiansyah, Sigit Priebadi; Suripno, Suripno; Abidin, Zaenal; Subastian, Djamal; Setiawan, Edhie Budi
Jurnal Ekonomi Manajemen Sistem Informasi Vol. 7 No. 2 (2025): Jurnal Ekonomi Manajemen Sistem Informasi (November-Desember 2025)
Publisher : Dinasti Review

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/jemsi.v7i2.6726

Abstract

This study aims to analyze the influence of terminal location and accessibility on safety/security through service reliability among logistics companies operating at Tanah Merdeka Terminal, North Jakarta. A quantitative approach was employed using a survey method. The study population consisted of approximately 40 logistics companies in the research area, all of which were included in the sample using saturated sampling technique. Data collection was conducted through questionnaire distribution between March and June 2025. Data analysis was carried out using Structural Equation Modeling based on Partial Least Squares (PLS-SEM) with the assistance of SmartPLS version 4.1 software. The results indicate that service reliability has a significant influence on safety/security. Additionally, terminal location indirectly affects safety/security through service reliability. However, accessibility was found to have no significant direct or indirect effect on service reliability and safety/security. These findings highlight the critical role of enhancing service reliability as a key factor in improving logistics safety and security.
Analysis of The Effect of On-Time Performance, Safety, Comfort, And Accessibility on E-WOM Through Passenger Satisfaction at Cililitan Terminal Prasetyo, Nur; Arubusman, Dian Artanti; Indrawan, Rully; Subastian, Djamal; Abdurachman, Edi
Jurnal Ekonomi Manajemen Sistem Informasi Vol. 7 No. 2 (2025): Jurnal Ekonomi Manajemen Sistem Informasi (November-Desember 2025)
Publisher : Dinasti Review

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/jemsi.v7i2.6727

Abstract

This study investigates the effects of on-time performance, safety, comfort, and accessibility on electronic Word of Mouth (e-WOM) through passenger satisfaction at Cililitan Bus Terminal. Using a quantitative approach, data were collected from 270 respondents through a structured questionnaire and analyzed with Partial Least Squares Structural Equation Modeling (PLS-SEM). The results show that on-time performance, comfort, and accessibility significantly influence passenger satisfaction, while safety does not. Furthermore, on-time performance and comfort have a direct and significant impact on e-WOM, whereas safety and accessibility do not. Passenger satisfaction serves as a mediating variable, strengthening the relationship between service quality factors and e-WOM. These findings highlight the importance of punctuality, comfort, and ease of access in enhancing passenger experience and fostering loyalty through positive word of mouth. Terminal operators are encouraged to focus on improving these aspects to ensure sustainable service quality and customer engagement.
Analysis of the Influence of Service Innova-Tion Aspects, Rates, With the Mediation of Trust Level on Inter-City Inter-Province Bus Ticket Purchase Retention (Case Study of PO Sinar Jaya) Yulianto, Eko; Abidin, Zaenal; Subastian, Djamal; Marlita, Devi; Tatiana, Yana
Jurnal Ekonomi Manajemen Sistem Informasi Vol. 7 No. 3 (2026): Jurnal Ekonomi Manajemen Sistem Informasi (Januari - Februari 2026)
Publisher : Dinasti Review

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/jemsi.v7i3.7259

Abstract

This study aims to analyze the impact of service innovation, pricing, and trust on ticket purchase retention for intercity and interprovincial (AKAP) buses at PO Sinar Jaya. Despite the increasing number of passengers, ticket purchase retention remains suboptimal, and the load factor is only 50%, far below the ideal standard of 70%. This phenomenon suggests that factors beyond passenger volume, such as service innovation and pricing policies, play a crucial role in influencing customer loyalty. The research employs a descriptive method with a quantitative approach. The study population consists of all PO Sinar Jaya passengers in 2023, totaling 5,635,602 passengers. The sampling technique used is Random Purposive Sam-pling. The sample size is determined using Hair’s (2020) formula, based on the number of research indicators. Data was collected through questionnaires, and analysis was conducted using the Structural Equation Modeling (SEM) method with SmartPLS software. The results indicate that service innovation positively influences trust and ticket purchase retention, whereas pricing does not significantly impact trust but positively affects ticket purchase retention. Additionally, trust plays a crucial role in enhancing purchase retention. The findings highlight the importance of service innovation and competitive pricing strategies in improving customer loyalty at PO Sinar Jaya.
The Driving Factors of Passenger Loyalty on the Jabodetabek Commuter Line Train: A Theory of Planned Behavior Perspective Hendra, Wedi; Subastian, Djamal; Maemunah, Siti
Dinasti International Journal of Education Management and Social Science Vol. 7 No. 2 (2025): Dinasti International Journal of Education Management And Social Science (Decem
Publisher : Dinasti Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/dijemss.v7i2.5699

Abstract

This study aims to analyze the factors that influence the loyalty of Jabodetabek Commuter Line (KRL) passengers, using the Theory of Planned Behavior (TPB) perspective. This study focuses on the influence of attitudes, social norms, perceived behavioral control, and satisfaction on the intention to be loyal to KRL. The method used in this study is quantitative, employing Structural Equation Modeling (SEM) using Smart PLS software to measure the relationships between latent variables and related indicators. The results of the study indicate that the factors influencing KRL user loyalty are social norms, including influences from family, friends, and superiors. Behavioral control also has a significant influence, particularly regarding availability, travel time, and punctuality. Although positive attitudes toward the KRL do not directly influence loyalty, positive user experiences related to service quality, such as comfort and safety, play a significant role in enhancing loyalty. User satisfaction with KRL services was also found to have a positive effect on the intention to be loyal, highlighting the importance of improving service quality in maintaining and enhancing satisfaction. This study suggests improving service quality, enhancing mode integration, and providing incentives to boost passenger loyalty, as well as strengthening social norms that support the use of public transportation. These findings contribute to transportation planning in densely populated urban areas like Jabodetabek to achieve sustainable transportation systems.
From Cost to Service: Building a Smarter Fare Model for Buy-the-Service Transit Asrori, Ahmad Fajar; Handayani, Susanty; Suryobuwono, Abdullah Ade; Subastian, Djamal; Nashrullah, Nashrullah
Dinasti International Journal of Education Management and Social Science Vol. 7 No. 3 (2025): Dinasti International Journal of Education Management and Social Science (Febru
Publisher : Dinasti Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/dijemss.v7i3.6110

Abstract

The transition from traditional cost-based to service-oriented fare models represents a paradigm shift in public transport financing. This study develops a comprehensive fare calculation model for Buy-the-Service (BTS) transit systems that integrates operational costs, user satisfaction, Ability to Pay (ATP), and Willingness to Pay (WTP). Using data from BisKita Trans Bekasi Patriot corridor in Indonesia, we employed multiple linear regression analysis with 314 users to derive a predictive WTP model: WTP = 2,589.329 + (256.865 × Satisfaction) + (0.030 × ATP). Results indicate that operational costs per passenger (IDR 17,060.20) significantly exceed user WTP (IDR 4,178.34), necessitating a subsidy of IDR 12,876.71 per passenger to maintain service sustainability. Statistical validation confirms model robustness (F = 8.377, p < 0.001) with no multicollinearity issues (VIF = 1.097). The study demonstrates that user satisfaction significantly influences fare acceptance, with each satisfaction unit increasing WTP by IDR 256.87. These findings provide actionable insights for policymakers implementing BTS schemes in developing countries, emphasising the critical role of targeted subsidies in balancing affordability with operational viability while maintaining service quality standards.
Co-Authors Agustin, Arneta Anindya, Badzlina Asrori, Ahmad Fajar Devi Marlita, Devi Dian Artanti Arubusman, Dian Artanti Edhie Budi Setiawan, Edhie Budi Edi Abdurachman EKO YULIANTO Farisyi, Sofwan Handayani, Susanty Hendra, Wedi Ichwan, Gema Akbar Indrawan, Rully Najoan, Denny J. Nashrullah, Nashrullah Prasetyo, Nur Siti Maemunah Suripno Suripno Suryobuwono, Abdullah Ade Widiansyah, Sigit Priebadi Yana Tatiana, Yana Zaenal Abidin