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INDONESIA
JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN
Published by Universitas Negeri Yogyakarta
ISSN : 25487590     EISSN : 25487590     DOI : -
Core Subject : Education, Social, Engineering,
Education Mechanical Engineering Social Sciences
Jurnal Dinamika Vokasional Teknik Mesin (JDVTM) is published by the Department of Mechanical Engineering Education, Faculty of Engineering, State University of Yogyakarta. The journal is published twice a year in April and October. Each publication contains articles comprising high quality theoretical and empirical original research papers, review papers, and literature reviews. The scope of study of this journal includes mechanical engineering education, technology and vocational education, learning and curriculum development, learning method development, and learning media. All of the fields study, particularly in mechanical engineering vocational and education. The articles submitted should be attended to the particular topics above.
Arjuna Subject : -
Articles 185 Documents
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AN ANALYSIS OF DIFFERENCES IN LEARNING OUTCOMES OF MANUFACTURING TECHNICAL DRAWING IN VOCATIONAL HIGH SCHOOLS IN SLEMAN REGENCY suri, hesty monica; Ayuni Lestari; Insan Kamil
Jurnal Dinamika Vokasional Teknik Mesin Vol. 10 No. 1 (2025)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v10i1.89415

Abstract

This study aims to analyze the differences in learning outcomes of Manufacturing Technical Drawing among vocational high schools (SMK) in Sleman Regency, as well as to compare the specific achievements of public vocational schools (SMK Negeri).The study employed a quantitative descriptive method, involving 142 twelfth-grade students from the Mechanical Engineering program across five vocational schools: SMKN 1 Seyegan, SMKN 2 Depok, SMK Muhammadiyah Prambanan, SMK Nasional Berbah, and SMK Piri Sleman. Data were collected through a learning outcome test that assessed conceptual understanding, drawing skills, and proficiency in using design software. The results revealed significant differences in students' learning outcomes among the schools. SMKN 2 Depok achieved the highest average score (74.35), while SMK Piri Sleman recorded the lowest (65.29). A focused analysis of public vocational schools indicated that both SMKN 1 Seyegan (72.85) and SMKN 2 Depok (74.35) demonstrated high achievement levels, with a relatively small gap between their scores. Several factors contributed to these differences, including teacher competence, availability of facilities, teaching strategies, and student motivation. These findings are expected to provide valuable insights for schools to enhance the quality of teaching and learning.
CHARACTERISTICS OF HARDNESS AND MICROSTRUCTURE OF RECYCLED PISTONS MANUFACTURED BY SAND CASTING PROCESS Priyambodo, Bambang Hari; Handoko; Felixtianus Eko Wismo Winarto; Amida Tri Andani; Martinus Heru Palmiyanto; Kaleb Priyanto
Jurnal Dinamika Vokasional Teknik Mesin Vol. 10 No. 2 (2025)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v10i2.86156

Abstract

Motorcycle piston waste, made from aluminum, is often poorly managed despite its advantages in corrosion resistance and thermal conductivity. This study aims to enhance the economic value of piston waste through recycling using the sand casting method. The melting process was conducted at a temperature of 843°C, followed by casting into sand molds. The recycled product is intended for use as a ship propeller component. Tests performed included Vickers hardness testing and microstructural analysis to evaluate the mechanical properties and material characteristics. The results showed that the recycled material exhibited an average hardness of 77.2 kg/mm², consistent with standard aluminum hardness. Microstructural analysis revealed the presence of porosity which may affect mechanical strength; however, this porosity did not reduce the material's resistance to mechanical damage and provided good toughness. Based on these findings, it can be concluded that motorcycle piston waste recycled by sand casting at 843 °C has potential for use in manufacturing high-value components such as ship propellers, considering the hardness quality and microstructural characteristics of the material.
PRESCRIPTIVE MAINTENANCE OF KOMATSU DUMP TRUCK HD785-7 USING NAÏVE BAYES CLASSIFIER UNDER FULL MAINTENANCE CONTRACT Paimin; Baskoro, Gembong; Sahputra, Iwan
Jurnal Dinamika Vokasional Teknik Mesin Vol. 10 No. 2 (2025)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v10i2.89737

Abstract

This study proposes a Prescriptive Maintenance (RxM) framework aimed at improving the Physical Availability (PA) of Komatsu Dump Trucks HD785-7 operated under a Full Maintenance Contract (FMC) at PT ABC Site Sangkulirang. The research integrates the DMAIC methodology with the Knowledge Discovery in Databases (KDD) process to systematically analyze operational failures. Historical breakdown data were preprocessed and modeled using a Naïve Bayes (NB) classifier, selected for its robustness in handling categorical features common in maintenance records. The model demonstrated high predictive performance with 97.93% accuracy, 100% precision, 94.12% recall, and an AUC of 0.995, indicating strong reliability in distinguishing high-risk conditions. The RxM framework was embedded into daily maintenance planning and Standard Operating Procedures (SOPs), supported by a monitoring dashboard for continuous feedback and retraining. As a result, the proportion of Breakdown Unscheduled (BUS) events decreased from 45% in 2024 to 26% in mid-2025, while fleet PA consistently exceeded the contractual target of 92%, reaching 95.5%. These findings confirm that embedding prescriptive analytics into maintenance workflows not only reduces unplanned downtime but also enhances resource allocation and decision-making. The case study highlights the practical value of combining statistical learning with structured process improvement to drive digital transformation in mining operations.
EMPLOYMENT 5.0: THE RELATIONSHIP BETWEEN STUDENTS' PERCEPTION OF WELDING TECHNOLOGY COURSES AND THE WORK READINESS Januariyansah, Sapitri; Yulanto, Dwiki Muda; Siregar, Batumahadi; Situmorang, Hasianna Nopina; Gunawan, Safri; Doni, Rahma
Jurnal Dinamika Vokasional Teknik Mesin Vol. 10 No. 2 (2025)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v10i2.92101

Abstract

Work readiness is an important factor in overcoming the high unemployment rate of college graduates. Various efforts have been made to improve the quality of work readiness, such as through welding technology courses. However, practical contributions measured through statistical analysis have never been made to date. The purpose of this study is to analyze the relationship between students' perceptions of welding technology courses and work readiness. This type of research was ex-post facto research with a quantitative approach. The data collection technique used a questionnaire technique. The data analysis technique used correlational inferential analysis. The results of the study indicate that students' perceptions of welding technology courses (X) have a relationship with work readiness (Y) in the moderate category (r = 0.577) with the amount of contribution based on the coefficient of determination (r2 = 0.333) which means that variable X contributes 33.3% to Y. Based on the regression coefficient (b = 0.228) which shows that if variable X increases by 1 unit then variable Y increases by 0.228. The implications of this study indicate that welding technology courses make a moderate contribution to improving work readiness
DETERMINING THE JOB READINESS OF VOCATIONAL GRADUATES IN THE INDUSTRIAL REVOLUTION 4.0 ERA: PERSPECTIVES ACADEMICS & PRACTITIONERS Indra, Muhammad; Pardjono, Pardjono; Rahdiyanta, Dwi; Triyono, Mochamad Bruri; Herdianto, Yogi; Saputra, Romy
Jurnal Dinamika Vokasional Teknik Mesin Vol. 10 No. 2 (2025)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v10i2.90556

Abstract

The work readiness of vocational graduates is crucial for realizing Independent Learning and Independent Campus (MBKM (acronyms in Bahasa)). However, there are pros and cons from various parties and issues regarding the lack of readiness (competence) of vocational graduates in the 4.0 era, and few discussions about the relationship between this and MBKM. Therefore, this article aims to analyze the best practices in MBKM for the work readiness of vocational graduates in the era of the 4.0 industrial revolution by applying a quantitative survey method. The results of the study reveal that character is the dominant factor for vocational work readiness in the era of the 4.0 industrial revolution, followed by technical and non-technical competencies, with the conclusion that character and its sub-aspects, such as honesty, discipline, responsibility, hard work, a creative attitude (open to new ideas), and curiosity, are fundamental to supporting the future of vocational graduates who are able to compete globally

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