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Refiza
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Analysis of potential hazards and risks of container loading and unloading activities on work at PT. Pelindo Multi Terminal Mahendra, Hamzah; Zurairah, Masdania; Refiza
Jurnal VORTEKS Vol. 5 No. 1 (2024): April 2024
Publisher : Program Studi Teknik mesin, Fakultas Teknik, Universitas Al Azhar Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54123/vorteks.v5i1.350

Abstract

HIRARC is a hazard identification, risk assessment, and risk control process, which identifies potential hazards in ordinary and unusual business activities, including an assessment of potential hazards and strategies to mitigate risks. Work accidents can occur due to actions, human conditions, and mechanical factors. The research method is data analysis in the work process and container filling, then risk control of each process. The data in the hazard and risk assessment is a qualitative analysis in AS/NZS 4360:2004. 53 sources of danger were identified from 12 stages of work. The results of the risk evaluation showed a low-risk level of 32% with 18 sources of danger, a moderate risk level of 28% with 16 sources of danger, a high-risk level of 16% with 9 sources of danger, and an extreme risk level of 24% with 14 sources of danger. This study concludes that in the dismantling process there are four stages of work, namely starting from the opening of the hatch (3 sources of danger), stevedoring (20 sources of danger), cargodoring (4 sources of danger), and delivery (2 sources of danger). In the loading process, there are four stages of work, starting from receiving (6 sources of danger), cargodoring (4 sources of danger).
Lean six sigma approach to increase process cycle efficiency in palm oil processing at PT. X Puspita, Riana; Polewangi, Yudi Daeng; Fazri, Muhammad; Refiza; Siregar, Zufri Hasrudy
Jurnal VORTEKS Vol. 5 No. 1 (2024): April 2024
Publisher : Program Studi Teknik mesin, Fakultas Teknik, Universitas Al Azhar Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54123/vorteks.v5i1.357

Abstract

The Indonesian palm oil industry, a global leader in production, faces increasing challenges in maintaining efficiency and quality. This study aims to apply the Lean Six Sigma methodology to enhance production processes by integrating Lean Manufacturing principles with the systematic, data-driven approach of Six Sigma. Using the Define-Measure-Analyze-Improve-Control (DMAIC) framework, the research identifies and mitigates inefficiencies in key stations of a palm oil mill. Novelty lies in the application of Lean Six Sigma to the palm oil industry, demonstrating significant improvements: a 16% increase in process cycle efficiency, a reduction of 70.5 kg in daily fresh fruit bunch (FFB) losses, and a decrease in associated costs by IDR 176,750 per day. The findings underscore the potential for continuous improvement in the industry through the systematic application of Lean Six Sigma.
Pelatihan dan implementasi perencanaan pencahayaan dan sirkulasi udara untuk lingkungan sehat dan nyaman pada Proyek Pembangunan Gedung UMKM-USU Siregar, Zufri Hasrudy; Mawardi; Rigitta , Prinsi; Puspita, Riana; Refiza; Simorangkir, Simon Petrus; Suita, Diana
Jurnal Derma Pengabdian Dosen Perguruan Tinggi (Jurnal DEPUTI) Vol. 4 No. 2 (2024): Juli 2024
Publisher : LPPM Universitas Al-Azhar medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54123/deputi.v4i2.363

Abstract

Kualitas udara dalam ruangan yang buruk di gedung perkantoran dapat menurunkan produktivitas dan kesehatan pekerja. Penelitian ini bertujuan mengevaluasi efektivitas pelatihan dalam meningkatkan pemahaman dan penerapan sistem ventilasi yang baik di gedung Usaha Mikro, Kecil, dan Menengah (UMKM)-USU. Metode penelitian yang digunakan adalah kombinasi antara kualitatif (Focus Group Discussion) dan kuantitatif (survei). Hasil penelitian menunjukkan peningkatan signifikan dalam pemahaman peserta pelatihan mengenai pentingnya kualitas udara. Namun, implementasi sistem ventilasi yang efektif masih terkendala oleh beberapa faktor, seperti keterbatasan anggaran dan kurangnya kesadaran manajemen. Penelitian ini menyimpulkan bahwa pelatihan merupakan langkah awal yang baik, namun perlu didukung oleh kebijakan yang lebih komprehensif dan keterlibatan berbagai pihak untuk mencapai kualitas udara dalam ruangan yang optimal di gedung UMKM. Keterbaruan penelitian ini terletak pada fokusnya pada UMKM di Indonesia dan identifikasi kendala spesifik yang dihadapi dalam konteks lokal
Optimalisasi sistem plumbing hemat air di Rusun Brimob Sampali Medan: edukasi teknologi dan manajemen limbah cair Siregar, Zufri Hasrudy; Nasution, Arif Fadillah; Mawardi; Puspita, Riana; Refiza; Nasution, Asmara Sari; Fazri, Muhammad; Lubis, Saidan Sany
Jurnal Derma Pengabdian Dosen Perguruan Tinggi (Jurnal DEPUTI) Vol. 5 No. 1 (2025): Januari 2025
Publisher : LPPM Universitas Al-Azhar medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54123/deputi.v5i1.399

Abstract

The availability of clean water in high-density urban areas is a pressing concern, as evidenced by the limited infrastructure and significant water wastage, which can reach 30%. This research aims to optimize the water-saving plumbing system in Brimob Sampali Flat in Medan through an integrative approach of applying modern technology and community education.This research utilizes a mixed method of qualitative (observation, interview) and quantitative (Likert scale questionnaire, digital measurement) data collection. The research process is outlined as follows: first, the existing conditions are analyzed; second, a new plumbing system is designed; third, water-saving technologies are implemented, such as gray water recycling systems and dual flush toilets; fourth, the effectiveness of the system is monitored and evaluated.The study population consisted of 30 residents of the Brimob Sampali Flat in Medan, and their pre- and post-implementation water consumption data were compared to measure the impact of the system.The results indicated that the implementation of the water-efficient plumbing system led to a 33.52% reduction in water consumption, while the integration of the gray water recycling system augmented this reduction by an additional 58.17%.The educational program was found to have enhanced residents' comprehension of water conservation, as evidenced by an average Likert score of 4.03 out of 5. Moreover, satisfaction with the novel system attained an average score of 4.1, signifying a positive response.The novelty of this study lies in the integration of water-saving technologies with an educational program designed specifically for the local Indonesian context, providing a holistic model that can be replicated in other regions to address clean water issues in a sustainable manner.
Optimalisasi pemanfaatan lahan kosong untuk meningkatkan ketahanan pangan santri di markaz penghafal Al-Quran Yayasan Layar Dakwah Zurairah, Masdania; Refiza; Lubis, Muhammad Fiza; Rezeki, Rahmad; Saragih, Edy
Jurnal Derma Pengabdian Dosen Perguruan Tinggi (Jurnal DEPUTI) Vol. 5 No. 1 (2025): Januari 2025
Publisher : LPPM Universitas Al-Azhar medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54123/deputi.v5i1.406

Abstract

Food security is a major challenge for Islamic boarding schools (pesantren) with limited resources and agricultural land. This study aims to optimize the use of vacant land to enhance food security at the Markaz Penghafal Al-Qur'an of Yayasan Layar Dakwah. The research methodology includes the application of agricultural techniques such as raised bed construction, selection of superior seeds, and efficient plant maintenance. The results show that utilizing vacant land with appropriate agricultural methods can increase food productivity and reduce dependence on external supplies. Tomato plants demonstrated the highest productivity at 2.25 kg/m², followed by red chili (1.75 kg/m²) and shallots (1.25 kg/m²). Additionally, the involvement of students in agricultural activities provided added benefits in terms of skill development and increased motivation. The novelty of this study lies in the integration of agricultural techniques with the pesantren education system, as well as the implementation of simple agricultural technologies that can be applied sustainably. Therefore, this research offers practical solutions to improve food security in pesantren and empower students in the field of agriculture.
Integration of forecasting and MRP models for optimization of CPO raw material inventory in the palm oil industry Sitepu, Oky Febryanta; Zurairah, Masdania; Rezeki, Rahmad; Refiza; Lubis, Muhammad Fiza
Jurnal VORTEKS Vol. 5 No. 2 (2024): October 2024
Publisher : Program Studi Teknik mesin, Fakultas Teknik, Universitas Al Azhar Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54123/vorteks.v5i2.429

Abstract

Inventory management of raw materials is a crucial aspect in ensuring the smooth production process of the palm oil industry. This study examines the effectiveness of integrating forecasting models and Material Requirement Planning (MRP) to optimize the inventory of Crude Palm Oil (CPO) raw materials at PT Salapian Indo Sawit. The palm oil industry in Indonesia represents about 3.5% of the national Gross Domestic Product (GDP) and provides employment for more than 17 million people. Inaccuracies in raw material inventory management lead to disruptions in the production process and inefficiencies in operational costs. The literature review shows that MRP methods with lot-for-lot techniques have been effectively implemented in various industries, but their application in the palm oil sector is still limited. The objective of this research is to analyze optimal forecasting methods for CPO raw material requirements and evaluate the efficiency of MRP implementation compared to conventional methods. The novelty of this research lies in the integration of forecasting methods (Moving Average and Single Exponential Smoothing) with MRP specifically for the palm oil industry, considering the unique characteristics of the palm oil supply chain. The study uses a descriptive quantitative approach with demand and historical production data from June 2020 to May 2021. The results indicate that the Single Exponential Smoothing method with ?=0.5 provides the best forecasting accuracy (MAPE=0.120; MSE=436.17). Implementing MRP with lot-for-lot techniques results in significant efficiencies, including a reduction in order frequency (26.67%), a reduction in order quantity (7.63%), and a reduction in initial inventory (8.10%). This study concludes that integrating an accurate forecasting model with the MRP system is effective for optimizing CPO raw material inventory and enhancing the operational efficiency of the company.
Co-Authors Asmara Sari Nasution Fazri, Muhammad Lubis, Saidan Sany Mahendra, Hamzah Mawardi Muhammad Fiza Lubis Nasution, Arif Fadillah Polewangi, Yudi Daeng Rezeki, Rahmad Riana Puspita, Riana Rigitta , Prinsi Saragih, Edy Simorangkir, Simon Petrus Siregar, Zufri Hasrudy Sitepu, Oky Febryanta Suita, Diana Zurairah, Masdania