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All Journal Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) Journal of Social Research
stefhen, Gilbert
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Humanities Computer Science & IT Economics, Econometrics & Finance Education Mechanical Engineering Social Sciences

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FACTOR ANALYSIS OF STUDENT PRACTICUM IMPLEMENTATION ON LATHE WORK Masnah, Siti Laily; stefhen, Gilbert; Solehudin, Agus; Putri, Amalia Aisyah
Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) Vol 8, No 1 (2021): Juni
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jmee.v8i1.36576

Abstract

Practical-based learning can improve students' thinking skills and abilities. Optimizing the implementation of the practicum needs to be supported by various factors so that student learning outcomes are good. This study aims to obtain the dominant factors that support the implementation of student practicum on lathe work. This study uses descriptive quantitative methods with data collection techniques using a questionnaire instrument. The research population is students from the Mechanical Engineering Education Study Program at a university in Bandung. The results of the study indicate that there is a relationship between a number of independent variables. The six independent variables identified as sources of practicum support were then grouped into two new factors. The two factors have a correlation greater than 0,5, so it can be concluded that it is feasible to summarize the six variables analyzed. Based on the total variance score explained, factor 1 is the dominant factor affecting the implementation of the lathe work practicum and according to the rotated component matrix it is known that from factor 1, the workshop building variable has the highest correlation and the tools and practicum materials have the second highest correlation. This shows that the variables of the workshop building and the variables of tools and practicum materials are very important to be used as references in supporting good learning outcomes in practical activities.
Development Of A Vehicle Routing Problem Model To Reduce Service Delays In Pickup And Delivery Operations Stefhen, Gilbert; Suryadi, Dedy; Iswari, Titi
Journal of Social Research Vol. 4 No. 8 (2025): Journal of Social Research
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/josr.v4i7.2683

Abstract

The rapid growth of the e-commerce sector in Indonesia has increased the demand for reliable and timely logistics services. However, challenges such as delayed pickups and deliveries continue to occur, leading to the accumulation of operational penalties. This study aims to develop a mathematical model based on the Vehicle Routing Problem (VRP) that addresses the complexities of modern logistics distribution. The proposed model, named HFMTVRPDPTW (Heterogeneous Fleet Multi-Trip Vehicle Routing Problem with Delivery and Pickup and Time Windows), incorporates five key elements: vehicle capacity, fleet heterogeneity, service time windows, simultaneous pickup and delivery, and multi-trip operations within a single working period. A systematic literature review of twenty-one prior studies was conducted to identify research gaps and inform the model’s development. The model is formulated using an integer linear programming (ILP) approach and aims to optimize service time accuracy while minimizing delays. The findings suggest that this model provides a more comprehensive and realistic approach to distribution challenges and offers an original contribution to the development of adaptive and efficient VRP models for logistics operations.
Co-Authors Agus Solehudin Dedy Suryadi Iswari, Titi Masnah, Siti Laily Putri, Amalia Aisyah