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Journal Of Engineering Sciences (Improsci)
Published by Ann Publisher
ISSN : 30323452     EISSN : 30317088     DOI : https://10.62885/improsci.v1i1
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Journal Of Engineering Sciences (Improsci) merupakan peer-reviewed jurnal yang mempublikasikan artikel-artikel ilmiah dalam bidang industri. Artikel-artikel yang dipublikasikan di Jurnal Improsci meliputi hasil penelitian ilmiah asli (prioritas utama), artikel ulasan ilmiah yang bersifat baru (tidak prioritas), serta hasil kajian dalam bidang industri.
Arjuna Subject : Teknik (semua kategori) - Tenik Industri dan Manufaktur
Articles 63 Documents
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Analysis of the Effect of Clothing Color Spectrum on the Absorption and Reflection Coefficient of Solar Radiation Kusumah, Abel Indra; Rahardiansyah, Bagus Dwi; Pika, Pika; Aulia, Caca; Qeianu Rafly, Marzhal
Journal of Engineering Sciences Vol 2 No 3 (2024): Vol 2 No 3 December 2024
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i3.587

Abstract

Clothing plays an important role in maintaining body comfort, especially in extreme weather conditions, but people often prefer clothes based on trends rather than thermal effectiveness. This study aims to examine the influence of clothing color on the increase in fabric surface temperature in various environmental conditions. The research method was carried out through experiments using different colored fabrics indoors and outdoors, as well as descriptive surveys to understand people's preferences and habits. The results of the experiment showed that dark-colored clothes absorbed heat more than light-colored clothes, while the survey revealed that most respondents still chose dark clothes for aesthetic reasons. This study contributes to a scientific understanding of the effect of clothing color on thermal comfort and underscores the need for public education to balance comfort with clothing style. This research is expected to be a guide in choosing clothes that suit thermal and aesthetic needs.
Integration of Ergo-Manufacturing and Simulation to Minimise Waiting Time for Cracker and Kemplang Production Process Flow (Case Study of PT. Belimo Food Industry) Setiawan, Heri; Susanto, Sani; Rinamurti, Micheline; Alfian, Achmad
Jurnal Improsci Vol 2 No 5 (2025): Vol 2 No 5 April 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/jurnalimprosci.v2i5.660

Abstract

Belimo Food Industry factory is engaged in the production of crackers and kemplang with the Belimo brand. Observations made at the packing workstation, there is still a buildup or bottleneck in the press machine that is not optimal and performance is not efficient because it violates many ergonomic principles in the manufacturing industry (Ergo-Manufacturing). This research explores the integration of Ergo-Manufacturing concepts with simulation. The research aims to improve performance and reduce process lead time. The research method used is quantitative-descriptive with primary data. Data processing uses the integration method of the Ergo-Manufacturing concept with Arena software-based simulation so as to provide solutions that can optimise the performance of process waiting time, improve efficiency, work comfort, and production capacity at the packing workstation. The results of the study after applying Ergo-Manufacturing with work environment settings can minimise the waiting time of the initial condition process with a process time of 58.273 minutes. Under the conditions of improvement scenario 1, the process waiting time of 26,830 minutes can reduce the process time by 60%, under the conditions of improvement scenario 2, the process waiting time of 14,562 minutes can reduce the process waiting time by 80% and under the conditions of improvement scenario 3, the process waiting time of 12,483 minutes can reduce the process time by 85%. The results of the BEP decision analysis for scenario 1 were selected by adding 1 press machine to 2 press machines which can increase production capacity by 128 products and reduce overtime costs incurred by the company for 1.5 hours by IDR 40,500 and BEP investment in press machines takes 3 years.
Study of Reliability of PC-PVT 2.0 on Sex and Sleep Duration Restrictions Factors Siswanto, Daniel; Susanto, Sani; Indranila, M.V.
Jurnal Improsci Vol 2 No 5 (2025): Vol 2 No 5 April 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/jurnalimprosci.v2i5.661

Abstract

Background.  There are two million workers in Indonesia who died from work accidents caused by fatigue. Fatigue is a contributing factor to accidents, injuries, and deaths. The differences between men and women hinder the relationship between fatigue and gender. On average, women work less hours than men. Aim. Lack of sleep, increased alertness, and longer duration of work can increase a person's fatigue. Someone who experiences sleepiness and fatigue has a strong relationship with decreased alertness. One of the measuring tools used for the evaluation of human awareness is the Psychomotor Vigilance Task (PVT). So the aim of this study is to determine the reliability level of PC-PVT 2.0 on gender and limited sleep duration factors Methods. This study uses Personal Computer (PC) - PVT 2.0 as a tool with three parameters: mean reaction time (RT), minor lapses, and number of false starts as indicators of alertness. The PC-PVT 2.0 tool has not been tested for its reliability in measuring the level of alertness when it is under the influence of sex differences and limited sleep duration. This study involved sixteen participants (eight men and eight women with a mean age of 21.375 1.087) to test PC-PVT 2.0 for 10 minutes with two tests for each treatment. During the PC-PVT 2.0 test, each participant's heart rate data was recorded using the Mi Band 2. Each participant received two treatments, sleep for 4 hours and 8 hours with two repetitions (test-retest). PC-PVT 2.0 testing on the effect of gender and limited sleep duration used two methods: Multivariate Analysis of Variance (MANOVA) and Analysis of Variance (ANOVA). In determining the reliability value, the Intraclass Correlation Coefficient (ICC) method is used with a two-way mixed effect model, definitions of absolute agreement & consistency, and multiple measurement types. Result. ANOVA and MANOVA test results showed that the three parameters of PC-PVT 2.0 affected the differences in sleep treatment conditions, namely lack of sleep (4 hours) and sufficient sleep (8 hours). However, the PC-PVT 2.0 parameter, which had an effect on gender differences, was only valid for the mean RT and minor lapses parameters. The reliability test results showed that the mean RT parameter had an ICC value of > 0.8 for all test categories (male, female, lack of sleep and sufficient sleep) with a good reliability rating category. The minor lapses parameter has an ICC value of > 0.7 for all test categories with sufficient reliability rating categories. Conclusion. This shows that the PC-PVT 2.0 device with the alertness indicator of the mean RT and minor lapse parameters has a high level of reliability when it is under the influence of sex differences and limited sleep duration. Implementation. PC-PVT 2.0 is reliable on Sex and Sleep Duration Restrictions Factors
Investigation Study of Semi-Bio Briquettes and Synthesis Briquettes From Used Polymer Waste Plastic Bottles Harmi Tjahjanti, Prantasi; Bamban Jakaria, Ribangun; Febriyan Ikhsanudin, Achmad; Fernanda, Rexy Eca; Akbar, Ali; Fahruddin, A'rasy
Jurnal Improsci Vol 2 No 5 (2025): Vol 2 No 5 April 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i5.668

Abstract

Up to 2022, Indonesians will produce 69 million tons of waste, of which 12.5 million tons, or 18.2%, will be plastic waste. Since 1995, the number has been growing dramatically. Recycling shredded waste to reduce its volume and enable processing into other materials is one way to manage plastic waste appropriately. This study specifically converted plastic bottle waste into briquettes for used polymer waste. Briquettes are made from recycled plastic bottles used to make polymer waste. There are two types of briquettes made from this waste: Semi-Bio Briquettes, which are made from recycled plastic bottles that have been used to make polymer waste mixed with natural materials like wood sawdust and coconut fiber and adhered with starch, and Synthesis Briquettes, which are made from recycled plastic bottles that have been used to make patchwork or fabric waste and paper waste. The next tests include (1) the Calorific Value Test (Bomb Calorimeter Method), (2) the Proximate Test following SNI 01-6235-2000, which assesses bound carbon, moisture content, ash content, volatile matter content, and other factors, and (3) the Gas/Smoke Emission Test following 2017 RI Minister of Environment and Forestry Regulation Standards. SEM was used to examine the microstructure of synthetic and semi-bio briquettes. While the calorific values for synthetic briquettes did not satisfy the specifications, the results for semi-bio briquettes met the standards. The proximate test results, however, revealed that the two briquettes did not meet the specifications for bound carbon content while meeting the standards for volatile matter content and moisture level. However, only semi-bio briquettes meet the requirements for ash content. The CO, CO2, and HC gas/smoke emission tests all yielded data that complied with the 2017 RI Minister of Environment and Forestry Regulation requirements. Semi-bio briquettes' microstructure observations were less hollow and denser than those of synthetic briquettes.
Analysis Of Investment Strategy For Adopting Battery Electric Vehicle Trucks in Indonesia (Case Study Of PT XYZ) Rio Sadewo, Gregorious; Saragih Siallagan, Manahan Parlindungan
Jurnal Improsci Vol 2 No 5 (2025): Vol 2 No 5 April 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i5.755

Abstract

Background. Indonesia's commitment to reducing greenhouse gas emissions through national policies and international agreements encourages the adoption of battery-electric vehicles. PT XYZ, a logistics company that operates more than a hundred diesel-powered trucks, is faced with a strategic decision regarding transitioning from internal combustion engine trucks to battery-based electric trucks amid changing technology and infrastructure readiness. Aims. This study aims to analyze PT XYZ's investment strategy for adopting electric battery-based trucks by identifying and prioritizing factors that influence the decision-making process. Methods. Using the Analytic Hierarchy Process (AHP) method as the main approach, this study evaluates technical, economic, infrastructural, environmental, social, governance, and corporate factors through a structured paired comparison. Result. The study's results show that economic, infrastructure, and governance factors are the most dominant considerations, and cost efficiency, availability of charging stations, and regulatory policies are the main drivers in decision-making. Conclusion. Based on the analysis's results, it was concluded that PT XYZ's adoption of electric battery-based trucks is not yet the optimal choice under current conditions, so maintaining a fleet of internal combustion engine trucks remains the most appropriate strategy. Implementation. This research provides valuable insights for PT XYZ and similar companies in emerging markets. It emphasizes the importance of aligning business strategy, infrastructure readiness, and regulatory support before adopting new vehicle technologies
Integration of Ergo-Manufacturing and Simulation to Minimise Waiting Time for Cracker and Kemplang Production Process Flow: (Case Study of PT. Belimo Food Industry) Setiawan, Heri; Susanto, Sani; Rinamurti, Micheline; Alfian, Achmad
Jurnal Improsci Vol 2 No 6 (2025): Vol 2 No 6 June 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i6.773

Abstract

Background. Belimo Food Industry factory is engaged in the production of crackers and kemplang with the Belimo brand. Observations made at the packing workstation indicate that there is still a buildup or bottleneck in the press machine that is not optimal, resulting in inefficient performance that violates many ergonomic principles in the manufacturing industry (Ergo-Manufacturing). Aims. This research explores the integration of Ergo-Manufacturing concepts with simulation. The study aims to improve performance and reduce process lead time. Methods. The research method employed is quantitative-descriptive, utilizing primary data. Data processing utilizes the integration method of the Ergo-Manufacturing concept with Arena software-based simulation to provide solutions that optimize process waiting time, improve efficiency, work comfort, and production capacity at the packing workstation. Result. The results of the study, after applying Ergo-Manufacturing with work environment settings, can minimize the waiting time of the initial condition process, with a process time of 58.273 minutes. Under the conditions of improvement scenario 1, the process waiting time of 26,830 minutes can reduce the process time by 60%, under the conditions of improvement scenario 2, the process waiting time of 14,562 minutes can reduce the process waiting time by 80% and under the conditions of improvement scenario 3, the process waiting time of 12,483 minutes can reduce the process time by 85%. Conclusion. The results of the BEP decision analysis for scenario one were selected by adding one press machine to 2 press machines, which can increase production capacity by 128 products. This also reduces overtime costs incurred by the company by 1.5 hours, amounting to IDR 40,500. The BEP investment in press machines takes 3 years.
Design of an Ergonomic Prototype for Oil Palm Harvesting and Post-Harvesting Aid to Reduce the Risk of Musculoskeletal Disorders Sukapto, Paulus; Prakoso, Dito; Paruhum, Matthew R; Winata, Sally F
Jurnal Improsci Vol 2 No 6 (2025): Vol 2 No 6 June 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i6.776

Abstract

Background. Oil palm harvesting has many steps until the oil palm fruit can be distributed to the next stage. It began with cutting oil palm fronds using egrek aids, picking up oil palm with a corner tool, and transporting it with angkong aids. Aims. Blind prototype of egrek, tojok, and angkong aids in reducing cases of Musculoskeletal Disorders (MSDs) that occur in workers. Method. The measurement method of MSDs with the Nordic Body Map and Rapid Entire Body Assessment (REBA). Prototype design with literature study and prototyping practices. Result. Modified Egrek tools, designed by the researcher, can make it easier for harvesters to cut palm fronds. The results of this tool repair are able to reduce the REBA value. The corner aid enables the operator to avoid making sudden movements to withstand the mass load of fresh fruit bunches (FFB), thereby reducing the risk of MSDs interference. Ankle aids reduce the risk of injury to the wrist because they push heavy loads. Conclusion. Prototypes of egrek, tojok, and angkong aids have succeeded in reducing the risk of MSDs in oil palm harvesting.
Implementation of Rapid Whole Body Assessment (REBA) to Reduce Musculoskeletal Disorders (MSDs) to Improve the Post-Harvest Work System of Oil Palm Sukapto, Paulus; Winata, Sally Feodora; Prakoso, Dito
Jurnal Improsci Vol 2 No 6 (2025): Vol 2 No 6 June 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i6.802

Abstract

Background. Oil palm harvesting workers who work unergonomically often experience the risk of Musculoskeletal Disorders (MSDs) when using traditional harvesting tools, namely, egrek and angkong. Egrek is a tool for harvesting palm oil, and angkong is a tool for transporting oil palm from the plantation to a temporary shelter for palm oil. The unergonomic working position of palm oil workers during harvesting, combined with repetitive movements such as cutting leaves and picking palm oil, causes discomfort for the workers. Aims. Researchers designed ergonomic harvesting tools (egrek) and transport tools (angkong) to improve efficiency in oil palm harvesting. Researchers evaluated harvesting and transportation activities using the Nordic Body Map (NBM) questionnaire and the Rapid Whole-Body Assessment (REBA) method. Result. The analysis results showed that nearly all harvesting activities carry a high risk of MSDs. The respondents to this study were nine harvesters and 11 oil palm harvest workers who operated angkong. Conclusion. The results showed that harvesters often experienced discomfort in the buttocks and abnormal posture, and repetitive movements required to cut leaves and oil palm bunches. The results of the REBA calculation for palm harvest showed that it was very high (Very High), with scores of 12 when lifting the angle and 11 when pushing the corner. Therefore, immediate improvement was needed, as this had an impact on the risk of MSDs. Implementation. Also, the results of REBA's calculation for transporting oil palm bunches with angkong were 9. To reduce the REBA value by adding the angkong wheel so that the final REBA value is 7.
Implementation of the Rapid Entire Body Assessment (REBA) Method in an Effort to Reduce Musculoskeletal Disorders (MSDs) in the Footwear and Automotive Industry Sukapto, Paulus; Geovando Gita, Graemmy; Amanda, Gabriela; Liauw, Justin; Gunawan, Maisie; Fathurohman, Muhamad
Jurnal Improsci Vol 2 No 6 (2025): Vol 2 No 6 June 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i6.803

Abstract

Background. This paper examines the impact of uncomfortable workplaces on absenteeism and employee complaints in the shoe and automotive industries. The risk of work-related accidents can be caused by several factors, such as unsafe actions resulting from unsuitable work positions for employees. Aims. This study analyzes the risk of MSDs interference among workers in the Material Inspection and Packing Department of PT X Shoe Company and PT Adyawinsa Stamping Industry (PT ASI). Method. The methods employed include direct observation in the workplace, visual documentation, in-depth interviews with workers, and measurements using the REBA. Result. The measurement results indicate that arranging materials on shelves and boxes on pallets has a REBA score that falls in the medium to high category, making it necessary to improve the working position as soon as possible. Conclusion. Improvement efforts are made to assistive devices, and directions are given to workers to improve their work posture. The results of work improvement using these tools will lead to a safer and more comfortable work environment. Implementation. This study proposes the application of anti-fatigue mats, improved air circulation, and work posture training to reduce ergonomic risks. With these interventions, employees can work more effectively, improving work comfort, reducing the risk of MSDs, and enhancing worker productivity.
Implementation of Green Ergonomics to Improve Work Environment Conditions by Using the Sustainable Work Index (SWI) in the Shoe Manufacturing Industry Sukapto, Paulus; Geovando Gita, Graemmy; Amanda, Gabriela; Liauw, Justin; Gunawan, Maisie
Jurnal Improsci Vol 2 No 6 (2025): Vol 2 No 6 June 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i6.844

Abstract

Background. The work system consists of people, equipment, and environments that are robustly integrated to achieve the goals of the work system. Aims. The purpose of this study is to evaluate and improve the conditions of the work environment with a Green Ergonomics approach using the Ergonomic Triad Model that focuses on the Sustainable Work Index (SWI). Method. The four SWI factors that were analyzed were Human Work Factor (HWF), Workstation Design Factor (WDF), Organizational Environment Factor (OEF), and Environmental Conditions Factor (ECF). Result. The results of the initial SWI calculation were in the Materials Inspection (68.45%) and Packing (63.83%) departments, categorized as "regular". Improvement efforts to enhance SWI values include adjusting working hours, providing ergonomic chairs, implementing visual displays that promote healthy habits, and improving working environment conditions, such as lighting and room temperature. Conclusion. This study demonstrates that a comprehensive Green ergonomics approach can enhance the quality of work and significantly improve worker welfare. Implementation. The implementation of improvements for these five things resulted in SWI values in the Material Inspection Department (to 82.40%) and in Packing (to 84.25%);

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