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Mahardika Darmawan Kusuma Wardana
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PELS (Procedia of Engineering and Life Science)
Published by Universitas Muhammadiyah Sidoarjo
ISSN : -     EISSN : 28072243     DOI : https://doi.org/10.21070/pels
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering
PELS (Procedia of Engineering and Life Science) is an international journal published by Faculty of Science and Technology Universitas Muhammadiyah Sidoarjo. The research article submitted to this online journal will be double blind peer-reviewed (Both reviewer and author remain anonymous to each other). The accepted research articles will be available online following the journal peer-reviewing process. Language used in this journal is Bahasa (Indonesia) or English. Aims and Scope of this journal is science and technology.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 662 Documents
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A Optimizing Raw Material Procurement EOQ Approach for Reducing Overstock: Mengoptimalkan Pengadaan Bahan Baku dengan Pendekatan EOQ untuk Mengurangi Persediaan yang Berlebih Vidiasari, Mike; Jakaria, Ribangun Bamban
Procedia of Engineering and Life Science Vol. 5 (2024): Proceedings of the 7th Seminar Nasional Sains 2024
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v7i0.1587

Abstract

This research employs the Economic Order Quantity (EOQ) method to optimize procurement practices for welding wire in boiler manufacturing. With a focus on reducing storage and inventory costs, the study aims to determine the optimal order quantity. Findings reveal that the calculated total inventory cost using the EOQ method significantly reduces compared to the company's existing policy. The optimal order quantity of 407 boxes, purchased four times per year, coupled with a safety stock of 181 boxes, ensures efficient procurement management. This research underscores the importance of implementing quantitative analysis techniques in procurement strategies to enhance cost-effectiveness and operational efficiency in manufacturing industries. Highlight : The study determines the optimal order quantity of K71T welding wire, reducing storage and inventory costs. The Economic Order Quantity (EOQ) method is applied, resulting in a total inventory cost of Rp. 89,060,000,- compared to the company policy of Rp. 290,840,000,-. The findings can be used as a reference for other manufacturing companies facing similar procurement challenges to optimize their inventory management and reduce costs. Keywords: welding wire, optimal order quantity, inventory management, procurement challenges, manufacturing companies
Forecasting Raw Material Demand for Battery Breaker Production Process: Peramalan Permintaan Bahan Baku untuk Proses Produksi Pemecah Baterai Anshori, Muhammad Hizam; Cahyana, Atikha Sidhi
Procedia of Engineering and Life Science Vol. 5 (2024): Proceedings of the 7th Seminar Nasional Sains 2024
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v7i0.1588

Abstract

This study aims to identify the most effective forecasting method for predicting raw material demand in the tin smelting industry, addressing the challenge of uncertainty in material arrival and inaccurate demand forecasting. Three methods, namely moving averages with n = 3 and n = 5, and exponential smoothing, were evaluated using historical data. Results indicate that exponential smoothing with α = 0.2 outperformed the other methods, yielding the smallest error rate with a Mean Absolute Percentage Error (MAPE) of 23%, Mean Absolute Deviation (MAD) of 411, and Mean Squared Error (MSE) of 293303. The implication of these findings underscores the importance of employing appropriate forecasting techniques to optimize inventory management and mitigate shortages in critical industries reliant on volatile raw material supplies. Highlights : Accurate demand forecasting is crucial for companies engaged in smelting to prevent shortages and inventory increases. Three methods were used to determine the most appropriate forecasting method for raw material demand based on historical data: moving average with n = 3 and n = 5, and exponential smoothing with α = 0.2. The Exponential Smoothing Method with α = 0.2 had the smallest error rate, with a MAPE value of 23%, MAD of 411, and MSE of 293303, and can be used to optimize demand forecasting for the next period. Keywords: demand forecasting, smelting, raw materials, historical data, moving average, exponential smoothing.
Quality Control Analysis Using the Failure Mode and Effect Analysis Method: Analisis Pengendalian Kualitas Menggunakan Metode Failure Mode and Effect Analysis Hakim, Muchammad Lukman; Cahyana, Atikha Sidhi
Procedia of Engineering and Life Science Vol. 5 (2024): Proceedings of the 7th Seminar Nasional Sains 2024
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v7i0.1589

Abstract

This study aims to identify critical factors contributing to defects in Epodion rh-Erythropoietin Alfa syringes and propose strategies to minimize production flaws. Through Failure Modes and Effect Analysis (FMEA), the research identified cracking as the predominant defect, accounting for 43 out of 62 observed syringe flaws in a production batch of 162,332 units. The Risk Priority Number (RPN) calculation yielded a score of 162, indicating material-related issues as the primary concern. Consequently, the study recommends stringent quality testing of raw materials to enhance material strength and diminish product defects, thereby bolstering overall manufacturing quality. Highlights : The study aimed to investigate factors contributing to defective Epodion® rh-Erythropoietin Alfa syringes, with a focus on reducing cracks during manufacturing. A Failure Mode and Effect Analysis (FMEA) approach was used to identify the primary causes of failure, revealing cracking as the predominant issue affecting 43% of defective units. Enhanced quality control measures for raw materials prior to their utilization within the production process were recommended to minimize product defects. Keywords: Epodion, rh-Erythropoietin Alfa, syringes, FMEA, quality control.
Accu Scrap Raw Material Inventorycontrol Using the Min- Max Method: Pengendalian Persediaan Bahan Baku Scrap Accu Dengan Metode Min-Max Faizin, Muhammad Nur; Jakaria, Ribangun Bamban
Procedia of Engineering and Life Science Vol. 5 (2024): Proceedings of the 7th Seminar Nasional Sains 2024
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v7i0.1590

Abstract

This research investigates the efficacy of implementing the Min-Max method to enhance inventory control performance in a manufacturing setting converting ACCU scrap into tin metal. Focused on two product types, bullion, and ingots, the study aims to optimize inventory policies by determining safety stock, minimum and maximum stock levels, order quantities, and reorder points to mitigate stockouts and overstocks. Results demonstrate a significant improvement, with the Min-Max method enabling a 33% increase in raw material control effectiveness compared to previous methods. This research underscores the potential for the Min-Max approach to provide practical solutions for inventory management challenges in manufacturing, offering valuable insights for industry practitioners and researchers alike. Highlight : The Min-Max method improved inventory management effectiveness by 33%. This approach facilitated the determination of safe stock levels, minimal order quantities, and reorder points. Manufacturers experienced reduced operating expenses while maintaining competitive edge and responsiveness to market dynamics. Keywords: Accu scrap processing, Min-Max method, inventory control, supply chain optimization, resource allocation
Apllication Of The Moving Average Forecasting Method In Masonry Concrete Sales: Penerapan Metode Peramalan Moving Average Untuk Peramalan Penjualan Beton Masonry Romi, Mochammad; Putra, Boy Isma
Procedia of Engineering and Life Science Vol. 5 (2024): Proceedings of the 7th Seminar Nasional Sains 2024
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v7i0.1591

Abstract

This study aims to create a concrete sales forecasting system using the moving average method to predict sales for the next month in order to determine the amount of production that must be supplied in the next period. The study uses the moving average method which is widely used and has accuracy in forecasting. The results obtained mean error of 32630.95, MAD of 224532, MSE of 80977550000, standard error of 318154, Mape of 12.621% and average forecast of 1960074.0. The study implies that the moving average method is an effective tool for sales forecasting and can be used to make informed decisions about production planning and estimating future growth Highlight : The study aims to create a concrete sales forecasting system using the moving average method. The moving average method is an effective tool for sales forecasting and can be used to make informed decisions about production planning and estimating future growth. The study provides statistical measures such as mean error, MAD, MSE, standard error, and MAPE to evaluate the accuracy of the moving average method. Keywords: Sales forecasting, Moving average method, Production planning, Accuracy, Informed decisions.
Optimizing Maintenance Efficiency with OEE Method: Mengoptimalkan Efisiensi Pemeliharaan dengan Metode OEE Putera, Alfien Ramadhan Syach; Marodiyah, Inggit
Procedia of Engineering and Life Science Vol. 5 (2024): Proceedings of the 7th Seminar Nasional Sains 2024
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v7i0.1593

Abstract

This study investigates the effectiveness of roving machines in a production environment by employing the Overall Equipment Effectiveness (OEE) methodology. High downtime of the roving machine significantly hampers production processes, leading to reduced machine performance and speed, resulting in suboptimal OEE values. Through OEE calculations, a value of 66.92% was obtained, highlighting considerable room for improvement towards achieving world-class standards. The findings underscore the necessity for targeted enhancements to mitigate machine downtime, thereby enhancing overall production efficiency and competitiveness in the manufacturing sector. Highlights : Efficient utilization of roving machines through OEE optimization is crucial for enhancing production performance. High downtime of roving machines significantly impedes production processes, leading to decreased efficiency and competitiveness. Addressing downtime issues can lead to substantial improvements in overall production efficiency, aligning operations with global standards. Keywords: Roving machine, Overall Equipment Effectiveness (OEE), Production efficiency, Downtime reduction, Manufacturing competitiveness
Applying AHP for Assessing Zenbo Division Production Employee Performance: Penerapan Metode AHP untuk Menilai Kinerja Karyawan Produksi Divisi Zenbo Prasetyo, Doni; Marodiyah, Inggit
Procedia of Engineering and Life Science Vol. 5 (2024): Proceedings of the 7th Seminar Nasional Sains 2024
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v7i0.1594

Abstract

This research proposes an employee assessment system utilizing the Analytical Hierarchy Process (AHP) method to evaluate productivity levels. The absence of such a system poses challenges in gauging employee performance and its impact on company productivity. Through AHP, this study aims to provide decision support for performance evaluation, thereby maintaining high productivity levels. Results indicate significant shifts in employee rankings, highlighting the effectiveness of the proposed methodology in identifying and enhancing productivity. This research contributes to the discourse on employee performance assessment, offering practical implications for decision-makers aiming to optimize workforce productivity. Highlights : Enhanced decision-making: The utilization of AHP provides a structured approach for evaluating employee performance, facilitating informed decision-making processes. Improved productivity rankings: Implementation of the assessment system results in notable shifts in employee rankings, indicating its effectiveness in identifying high-performing individuals. Practical implications: Findings offer valuable insights for organizations seeking to optimize workforce productivity through systematic performance evaluation methodologies. Keywords: Employee productivity, Assessment system, Analytical Hierarchy Process (AHP), Decision support, Workforce optimization
Electric Motor Maintenance: Pemeliharaan Motor Listrik Hasfi, Akbar Rayhan; Syahrorini, Syamsudduha
Procedia of Engineering and Life Science Vol. 5 (2024): Proceedings of the 7th Seminar Nasional Sains 2024
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v7i0.1596

Abstract

Electric motors play a vital role in industrial operations, and their protection from overloading is crucial for ensuring longevity, safety, and efficiency. This article explores the significance of motor overload protection devices in safeguarding motors from damage caused by overloading, which can lead to overheating and potential failure. It discusses the functioning of various protection devices, such as thermal, magnetic, and electronic overload relays, and emphasizes the importance of selecting the right device based on motor type, size, application, and environmental conditions. The article also highlights the role of regular maintenance and adherence to safety standards in ensuring the reliable and effective functioning of these protection systems. By implementing appropriate protection measures, companies can optimize energy use, increase operational efficiency, and reduce damage and production disruptions, thus contributing to the sustainability and safety of electric motors in industrial settings vulnerable to overloading. Highlight : Overload relays protect the motor, motor branch circuit, and motor branch circuit components from excessive heat from the overload condition Overload relays are part of the motor starter and protect the motor by monitoring the current flowing in the circuit The selection of an overload relay is important because repeated tripping and reset can reduce the mechanical life of the relay and may cause damage to the motor Keywords: electric motors, overload protection devices, thermal overload relays, magnetic overload relays, electronic overload relays, motor type.
Periodic Maintenance Analysis of Diesel Motor Generator Set 900 kVA Power as Backup Energy: Analisis Pemeliharaan Berkala Motor Diesel Generator Set Daya 900 kVA Sebagai Energi Cadangan Rofiq Salam, Rois Nur; Widodo, Edi
Procedia of Engineering and Life Science Vol. 5 (2024): Proceedings of the 7th Seminar Nasional Sains 2024
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v7i0.1597

Abstract

In the realm of backup power sources, maintaining the efficiency of generators is paramount for ensuring reliability and availability during power outages. This study aims to evaluate generator efficiency through routine maintenance analysis, adhering to regulatory frameworks outlined in regulations such as Regulation No. 29 of 2012 and Electricity Law No. 30 of 2009. By employing methods including Mean Time Between Failures (MTBF) and assessing Actual Operating Time (AOT) against Specified Operating Time (SOT), this research determines the availability and compliance of each generator. Results highlight the importance of stringent regulatory compliance in enhancing the functionality and reliability of generators, thereby emphasizing the significance of routine maintenance for improved operational health. Highlight : Adherence to regulatory frameworks ensures operational compliance and reliability. Routine maintenance analysis enhances generator efficiency and availability. Availability assessment methods such as MTBF and AOT provide insights into operational health. Keywords: Generator reliability, Routine maintenance, Regulatory compliance, Availability assessment, Backup power sources
Implementation of Heaven Theme Study in the Spirit of Worship: Implementasi Kajian Tema Surga dalam Semangat Beribadah khoiri, khoiri
Procedia of Engineering and Life Science Vol. 5 (2024): Proceedings of the 7th Seminar Nasional Sains 2024
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v7i0.1603

Abstract

Worship is a central aspect of religious life practiced by believers with the aim of drawing closer to the Creator and adhering to the teachings of their faith. In the journey of worship, the theme of paradise plays a significant role as a source of motivation and spiritual guidance. Paradise, viewed as the ultimate destination filled with eternal happiness, pleasure, and peace, holds importance across various religious beliefs. Implementing studies on the theme of paradise in the spirit of worship is relevant for deepening understanding, motivating, and enhancing the quality of believers' worship. This research employs a qualitative approach, combining literature analysis and field studies. The analysis reveals that understanding the concept of paradise significantly influences believers' worship spirit. The theme of paradise serves not only as a personal motivator but also reinforces religious values and shapes moral behavior and ethics within religious communities. Challenges in implementing studies on the theme of paradise include varying individual understandings and interpretations of religious texts.D iscussion highlights the need for harmonizing understanding of the concept of paradise, optimizing the implementation of paradise-themed studies in worship through religious education and community activities, strengthening religious values through religious education programs, and addressing challenges through open dialogue and contextual approaches. This research contributes to a deeper understanding of implementing studies on the theme of paradise in the spirit of worship and proposes steps for developing more meaningful and directed worship practices within the religious context.

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