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All Journal Journal of Global Engineering Research & Science (J-GERS)
Sinta Restuasih
Department of Industrial Engineering, Faculty of Engineering & Computer Science, Jakarta Global University, 16412, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Environmental Science

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Design of Incubator System for Laboratory: Development, Implementation, and Performance Evaluation Ade Firdaus; Suci Imani Putri; Sinta Restuasih; Rino Ferdian Surakusumah; Muhammad Miftah El Huda
Journal of Global Engineering Research and Science Vol. 5 No. 1 (2026): Vol. 5 No. 1 (June 2026): Journal of Global Engineering Research & Science (J-G
Publisher : Jakarta Global University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/j-gers.v5i1.194

Abstract

Laboratory incubators play a pivotal role in microbiology research by facilitating the incubation and propagation of microorganisms. However, conventional incubators are often limited to specific sample containers and models, necessitating the use of multiple units for different applications. In response to this challenge, this study presents the development of a multifunctional digital incubator using acrylic materials and digital temperature control. The aim was to create an incubator capable of accommodating various sample containers, including tubes and microplates, within a single unit. The designed incubator features dimensions of 40cm x 40cm x 40cm, with the capacity to hold one rack of 48 tubes (measuring 27x9.5x8cm) and four microplates. It consumes 350VA of power and utilizes a BR6 temperature control system to maintain a precise temperature of 37±1°C. Performance testing revealed temperature variations of only 0.1°C (0.21%) within the permissible range of ±1°C, while timer accuracy was demonstrated at 100%. Measurements were conducted using a thermohygrometer and stopwatch. The developed multifunctional digital incubator meets the intended objectives, offering researchers a versatile and reliable tool for various laboratory applications, including ELISA assays and clinical chemistry experiments.
Layout Design Plan for PT. Golden Sweet Bakery Bread Factory Sinta Restuasih; Ayu Nurul Haryudiniarti; Jihan Atikah Septiani
Journal of Global Engineering Research and Science Vol. 4 No. 1 (2025): Vol. 4 No. 1 (June 2025): Journal of Global Engineering Research & Science (J-G
Publisher : Jakarta Global University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/j-gers.v4i1.123

Abstract

Designing an effective factory facility layout is an important first step in establishing a manufacturing industry, including a bakery. This study aims to design the layout of PT. Golden Sweet Bakery's production facilities from scratch, starting from needs analysis, designing the production process flow, to preparing the facility layout. The design process begins with identifying space requirements based on the planned production capacity, the types of products produced, and the equipment to be used. The next stage involves analyzing the workflow to ensure efficient material flow and minimize movement. The layout is designed based on the principles of separating clean and dirty ranges, grouping similar workstations, and optimizing space use. The design results show that the designed layout can create an efficient production flow, with minimal material movement distance and optimal production cycle time. This design also considers flexibility for future expansion. With a design approach from the beginning, this design is expected to be a strong foundation for PT. Golden Sweet Bakery's operations in meeting market needs effectively. Factory layout problems are problems that cannot be avoided by companies in all their operational activities. The long distance of material movement from one department to another will affect the company's ability to increase productivity and profitability. With a high total material movement per year, material handling costs will also increase. This study aims to determine the minimum total material movement to obtain the best final layout and minimize material handling costs.
Sensitivity Analysis of a Single-Server Fuel Queue System Using the M/M/1 Model: A Case Study of a Pertamini Station Sinta Restuasih; Eko Widodo Gustany; Fitri Retna Wijayanti; Ananda Putri Ariyani; Nur Maulida Fitria
Journal of Global Engineering Research and Science Vol. 4 No. 2 (2025): Vol. 4 No. 2 (December 2025): Journal of Global Engineering Research & Science
Publisher : Jakarta Global University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/j-gers.v4i2.181

Abstract

The rapid growth of motorcycle ownership in Indonesia has significantly increased the demand for fuel, particularly for daily transportation activities. This condition has encouraged the development of micro-scale refueling services, commonly known as Pertamini, which provide easier and more accessible fuel services for local communities. However, Pertamini stations generally operate with limited facilities and a single service channel, which may lead to queue formation, especially during peak hours. Long waiting times can reduce service efficiency and customer satisfaction, making queue system evaluation essential to support operational improvements. Therefore, this study aims to analyze the performance of the Pertamini service queue system using the M/M/1 queue model. This research applies a quantitative approach through direct field observation to collect data on customer arrival rates and fuel service times during a specified observation period. The collected data are used to determine the arrival rate (λ) and service rate (μ) as the main parameters in modeling the queue system. System stability is evaluated by comparing these parameters to ensure that service capacity can accommodate customer demand. Several performance indicators are analyzed, including system utilization, the average number of customers in the queue and in the system, and the average waiting time experienced by customers. The results indicate that under normal operational conditions, the queue system operates in a stable condition where the service rate exceeds the arrival rate. However, sensitivity analysis shows that an increase in arrival rate or a decrease in service rate significantly increases waiting time. Therefore, improving service efficiency is necessary to maintain system stability and reduce customer waiting time.
Co-Authors Ade Firdaus Ananda Putri Ariyani Ayu Nurul Haryudiniarti Eko Widodo Gustany Fitri Retna Wijayanti Jihan Atikah Septiani Muhammad Miftah El Huda Nur Maulida Fitria Rino Ferdian Surakusumah Suci Imani Putri