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All Journal Jurnal Pendidikan Vokasi Jurnal Pendidikan Teknik Mesin Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Motor Bakar : Jurnal Teknik Mesin Jurnal Rekayasa Energi dan Mekanika TOFEDU: The Future of Education Journal Journal Neosantara Hybrid Learning Kohesi: Jurnal Sains dan Teknologi Jurnal Global Ilmiah Journal of Vocational and Career Education
Supriyatna, Deddy
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Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Social Sciences Transportation Other

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ANALYSIS OF MECHANICAL COMPETENCY AND SERVICE PRICES ON CUSTOMER SATISFACTION AT CV. NIRMALA KN AUTOCARE WORKS Shidqi, Fahmi Shidqi; Supriyatna, Deddy
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 2 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i2.68039

Abstract

High-intensity use of personal transportation equipment will result in damages, which will disrupt daily performance; therefore, vehicle maintenance and repairs need to be carried out regularly and periodically. The problem that often occurs is that service prices are expensive, and yet the results are unsatisfactory. The reason behind this can be inadequate mechanical skills or competence. This research tested the relationship between mechanical competence and service prices on customer satisfaction at CV. Karya Nirmala Auto Care Jl. Pandeglang-Rangkas Gang H Kabal, Kabayan, Pandeglang Regency, Banten. This research uses quantitative methods, service price data, and mechanic competency at the Karya Nirmala Auto Care workshop. Data was collected using interviews and questionnaires. The data analysis used was multiple correlation, and the results showed a strong relationship between mechanical competence and service prices on customer satisfaction.
The Learning Innovation Skills of Vocational Teacher Candidates: A Case Study in the Vocational Education Program of Mechanical Engineering at Untirta Suryana, Nana; Ramdani, Sulaeman Deni; Supriyatna, Deddy
The Future of Education Journal Vol 4 No 7 (2025): #2
Publisher : Lembaga Penerbitan dan Publikasi Ilmiah Yayasan Pendidikan Tumpuan Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61445/tofedu.v4i7.957

Abstract

This study aims to explore learning innovation skills in vocational teacher candidates in the Mechanical Engineering Vocational Education Program (PVTM) at Sultan Ageng Tirtayasa University. A qualitative approach with a case study method was used in this research. Data were collected through observations and in-depth interviews, utilizing interview guides and assessment rubrics to ensure the objectivity of the analysis. The research sample was drawn from 30% of students previously categorized as having low skills based on earlier studies, with the condition that they had completed the School Field Introduction course (PLP). The results showed that this classification was not entirely accurate. Some students categorized as “low” actually demonstrated strong competencies in innovative skills such as creative thinking, collaboration, communication, and problem-solving. The findings suggest that PVTM students have potential that can be developed into adaptive vocational teachers who are capable of facing the challenges of 21st-century learning. Strengthening teaching strategies and holistic evaluations is crucial to optimizing their abilities.
ANALISIS WAKTU OPERASIONAL DAN DAMPAKNYA TERHADAP PERAWATAN UNIT GANTRY LUFFING CRANE: STUDI KASUS DI PT. PELABUHAN TANJUNG PRIOK CABANG BANTEN Andhika, Muhamad Bintang Putra; Supriyatna, Deddy; Surasa, Surasa
Kohesi: Jurnal Sains dan Teknologi Vol. 7 No. 10 (2025): Kohesi: Jurnal Sains dan Teknologi
Publisher : CV SWA Anugerah

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Abstract

Penelitian yang berjudul 'Analisis Waktu Operasi dan Dampaknya Terhadap Pemeliharaan Unit Gantry Luffing Crane di PT Pelabuhan Tanjung Priok Cabang Banten' ini membahas tentang tingginya waktu operasi crane dan dampaknya terhadap keausan komponen serta kebutuhan pemeliharaan. Penelitian ini bertujuan untuk menganalisis pola operasi crane, mengidentifikasi dampak perawatan, dan merumuskan strategi perawatan yang optimal untuk meningkatkan efisiensi dan mengurangi waktu henti. Menggunakan pendekatan kuantitatif dengan metode deskriptif dan analitis, data dikumpulkan melalui observasi, wawancara dengan teknisi, dan analisis data historis pemeliharaan. Teknik analisis yang digunakan adalah analisis statistik deskriptif untuk menggambarkan pola waktu operasional dan frekuensi perawatan, serta analisis korelasi dan regresi untuk mengukur hubungan antara waktu operasional dan kebutuhan perawatan. Hasilnya menunjukkan bahwa komponen hoist, dengan waktu operasional rata-rata 9600 jam, membutuhkan perawatan yang lebih sering dibandingkan dengan sistem luffing (6683 jam) dan sistem slewing (7256 jam). Analisis Inspeksi Harian juga mengungkapkan bahwa tekanan oli yang rendah (0 psi) merupakan indikator potensial masalah sistem pelumasan, yang meningkatkan risiko kerusakan alat berat sebesar 30%. Menerapkan strategi pemeliharaan berbasis waktu kerja yang terstruktur memungkinkan PT Pelabuhan Tanjung Priok Cabang Banten untuk meningkatkan efisiensi pengoperasian crane sebesar 25% dan mengurangi waktu henti secara substansial. Manfaat praktisnya meliputi pengurangan 20% biaya perbaikan dan pengurangan 30% waktu henti operasional, yang secara langsung berdampak pada produktivitas pelabuhan. Kata kunci: Waktu Operasional, Preventive Maintenance, Gantry Luffing Crane, Inspeksi Harian, Efisiensi Operasional, PT Pelabuhan Tanjung Priok. Abstract This research, titled 'Analysis of Operating Time and Its Impact on the Maintenance of Gantry Luffing Crane Units at PT Pelabuhan Tanjung Priok Banten Branch,' addresses the high operating time of cranes and its impact on component wear and maintenance needs. The study aims to analyze crane operating patterns, identify maintenance impacts, and formulate optimal maintenance strategies to improve efficiency and reduce downtime. Employing a quantitative approach with descriptive and analytical methods, data was collected through observations, interviews with technicians, and analysis of historical maintenance data. Analytical techniques included descriptive statistical analysis to describe operational time and maintenance frequency patterns, and correlation and regression analyses to measure the relationship between operational time and maintenance requirements. The results indicate that the hoist components, with an average operating time of 9600 hours, require more frequent maintenance compared to the luffing systems (6683 hours) and slewing systems (7256 hours). Daily Inspection analysis also revealed that low oil pressure (0 psi) is a potential indicator of lubrication system problems, increasing the risk of machine failure by 30%. Implementing a structured uptime-based maintenance strategy enabled PT Pelabuhan Tanjung Priok Banten Branch to enhance crane operating efficiency by 25% and substantially reduce downtime. The practical benefits include a 20% reduction in repair costs and a 30% reduction in operational downtime, directly impacting port productivity. Keywords: Operating Time, Preventive Maintenance, Gantry Luffing Crane, Daily Inspection, Operational Efficiency, PT Pelabuhan Tanjung Priok.
THE INFLUENCE OF SCHOOL AND FAMILY ENVIRONMENTS ON ACADEMIC ACHIEVEMENT OF GRADE X STUDENTS IN TECHNICAL DRAWING SUBJECT IN THE TKRO DEPARTMENT OF SMKN 7 SERANG Pahrudin, Iip; Supriyatna, Deddy; Putra, Ananda Yhuto Wibisono Putra
Journal of Mechanical Engineering Education Vol 12, No 1 (2025): June 2025
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jmee.v12i1.83380

Abstract

This study aims to determine the influence of school and family environments on student learning achievement in the subject of Engineering Drawing for class X TKRO at SMKN 7 Serang in the 2024/2025 academic year. The school environment includes physical, social, and academic aspects, while the family environment includes emotional support, supervision, and parental involvement. This study uses a quantitative approach with a survey method, involving all 31 class X TKRO students. Data were collected through a Likert scale questionnaire that had been tested for validity and reliability, as well as documentation of report card grades. Data analysis used the T test, F test, and multiple linear regression with the help of SPSS version 25. The results showed that neither the school environment nor the family environment had a significant effect, either partially or simultaneously, on student learning achievement. The coefficient of determination (R²) value of 0.086 indicates that the influence of the two variables is very low. This finding indicates that other factors such as learning motivation and learning strategies play a greater role in determining student achievement.
Turbine Governing System at PT PLN Indonesia Power PLTU Banten 2 Labuan Esa Mi'rajuddin, Septa; Supriyatna, Deddy; Putra, Ricky Cahyasari
The Future of Education Journal Vol 5 No 1 (2026): #2 IN PROGRESS
Publisher : Lembaga Penerbitan dan Publikasi Ilmiah Yayasan Pendidikan Tumpuan Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61445/tofedu.v5i1.1686

Abstract

This study aims to analyze the performance of the Turbine Governing System in a 100 MW steam turbine in maintaining power system frequency stability through the regulation of the steam chest, governor valve, and Emergency Stop Valve (ESV) under load variations of ±10% from the nominal power. The research employs a descriptive quantitative approach based on literature studies, supported by dynamic modeling and system response simulations under a droop configuration of 4–5%. The results show that a 10% load increase causes an initial frequency deviation of 0.18–0.22 Hz from the nominal 50 Hz, with an initial governor valve response time of 0.25–0.35 seconds and a settling time of 4–6 seconds, which remain within the standard operational limits of power systems. A 4% droop configuration produces a faster frequency response but with greater power overshoot (5–6%), while a 5% droop configuration provides better power stability with lower overshoot (3–4%), indicating a trade-off between response speed and system stability. The steam chest dynamic analysis reveals that an increase in the steam pressure time constant can slow frequency recovery by up to 18–22%. Under extreme disturbance conditions, the ESV is capable of closing within 0.15–0.20 seconds, effectively preventing turbine overspeed. These findings highlight that frequency stability is determined not only by the generating capacity of the power plant but also by the quality of dynamic response and the integrated coordination among the steam chest, governor valve, and ESV. This coordination becomes increasingly strategic in supporting the flexibility and reliability of power systems amid the growing penetration of renewable energy.
Co-Authors Adiyanto, Arnold Ananda Yhuto Wibisono Putra Andhika, Muhamad Bintang Putra Ardiansyah, Muhammad Robby Dani, Dandi Firman Eko Susilo Esa Mi'rajuddin, Septa FAISAL HARIS Fauzan, Danny Febnesia, Helleni Hamid Abdillah Haris Abizar, Haris Haryana, Jukri Hermawan, Reza Iman, Atep Nafial Hadi, Muhammad Nana Suryana Pahrudin, Iip Ramdani, Maftuh Ikhsan Ricky Cahyasari Putra Shidqi, Fahmi Shidqi Sulaeman Deni Ramdani Sumitra Sumitra Surasa Surasa YENI, YENI YENI