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Jurnal Riset Ilmu Teknik
Published by Lembaga Penelitian dan Ilmu Pengetahuan JEPIP
ISSN : 29877261     EISSN : 29877253     DOI : 10.59976
Core Subject : Engineering,
Engineering
Jurnal Riset Ilmu Teknik is a peer-reviewed journal, Jurnal Riset Ilmu Teknik is published three times annually, in May, August and December. Jurnal Riset Ilmu Teknik provides a place for academics, researchers, and practitioners to publish scientific articles. The scope of the articles listed in this journal is related to various topics such as Industrial Engineering, Informatics Engineering, Civil Engineering, Electrical Engineering, Architecture, Mechanical Engineering, Engineering Education, and other related engineering fields.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol. 2 No. 2 (2024): September" : 5 Documents clear
Synergistic Effects of Gypsum and Cement on the Geotechnical Properties of Clay Soils: Experimental Evaluation of CBR, UCS, and Compaction Characteristics Basral Anugrah; Haiban, Haiban
Jurnal Riset Ilmu Teknik Vol. 2 No. 2 (2024): September
Publisher : Lembaga Penelitian dan Ilmu Pengetahuan JEPIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59976/jurit.v2i2.89

Abstract

Expansive clay soils are widely recognized as problematic subgrade materials due to their high plasticity, low strength, and pronounced swelling–shrinkage behavior. This study investigates the synergistic effect of gypsum and cement as stabilizing agents for clay soils. Laboratory tests were conducted on 96 soil specimens, with stabilizer contents of 1%, 3%, and 5% (by dry weight) and curing periods of 1, 7, and 14 days. Standard tests, including Atterberg limits, compaction, California Bearing Ratio (CBR), and Unconfined Compressive Strength (UCS), were performed according to ASTM/SNI standards. Results demonstrate that the combined use of gypsum and cement significantly reduces the plasticity index from 41.54% to 8.35% and increases CBR from 1.99% to 23.65% after 14 days of curing. UCS values also improved, reaching a peak of 1.84 MPa under optimum stabilization conditions (5% additive, 14 days curing). These improvements are attributed to cation exchange and pozzolanic reactions that form calcium silicate hydrate (C–S–H) and calcium aluminate hydrate (C–A–H) phases, enhancing soil particle bonding and reducing voids. The findings indicate that combined gypsum–cement stabilization is not only effective in improving mechanical properties but also modifies the soil classification from high plasticity clay (CH) to low plasticity clay (OL). This research contributes practical guidelines for road subgrade improvement and advances the scientific understanding of chemical–mineral interactions in soil stabilization.
Optimizing Hospital Pharmaceutical Warehouse Operations Using Discrete Event Simulation Aldi Musliadin; Dwi Apriadi
Jurnal Riset Ilmu Teknik Vol. 2 No. 2 (2024): September
Publisher : Lembaga Penelitian dan Ilmu Pengetahuan JEPIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59976/jurit.v2i2.97

Abstract

This study aims to analyze and optimize the operational performance of the pharmaceutical logistics warehouse at Hospital Yogyakarta using a Discrete Event Simulation (DES) approach. Preliminary observations revealed a significant workload accumulation during peak hours (09:00–10:55), leading to drug distribution delays, a 10–15% weekly discrepancy between physical and system stock data, and a 12% decline in patient satisfaction. Data were collected through direct work time measurements and secondary hospital records, then modeled using an Activity Cycle Diagram (ACD) and simulated with Arena software. Three improvement scenarios were tested: (1) reassigning goods and invoice verification tasks to the ordering operator, (2) adding one new operator dedicated to the posting activity in the system, and (3) combining both strategies. Simulation results indicate that Alternative III provides the best performance, reducing the average cycle time from 411.4 minutes to 65.57 minutes per cycle, improving productivity by up to 99%, and achieving balanced workloads among operators. These findings demonstrate that DES-based modeling is an effective tool for identifying bottlenecks and designing process improvements without requiring costly technological investment. This research contributes to the field of hospital pharmaceutical logistics management by offering an evidence-based decision-making framework to enhance operational efficiency and service quality sustainably.
Decision Support System Model for PPPK Teacher Selection Using the AHP Method Adinda Fadilah Hamdi; Refliana, Refliana
Jurnal Riset Ilmu Teknik Vol. 2 No. 2 (2024): September
Publisher : Lembaga Penelitian dan Ilmu Pengetahuan JEPIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59976/jurit.v2i2.106

Abstract

This study to develop a decision support system based on the Analytical Hierarchy Process (AHP) in the recruitment process of Government Employees with Work Agreements (PPPK) at SMP Negeri 1 Ukui. The background of this study is the need for a more objective, transparent, and accountable selection mechanism to reduce subjectivity in determining the passing grade for honorary teachers. The research method used a descriptive quantitative approach with data collection through observation, interviews, and paired comparison questionnaires administered to the principal, senior teachers, administrative staff, and school supervisors. The results of the analysis show that the Administration criterion received the highest weight (0.343), followed by Suitability Selection (0.535) and Interviews (0.122). In the subcriteria, the aspect of administrative document filing was the dominant factor (48%), while in suitability selection, teacher performance ranked highest (39%). Sensitivity analysis proved that the ranking results of teacher candidates were relatively stable even though the criteria weights changed. These findings confirm that AHP can minimize the subjectivity of selection and provide a quantitative basis for determining candidate priorities. This study has implications for improving the accountability of PPPK recruitment policies at the school level while opening up opportunities for the integration of hybrid methods such as AHP–TOPSIS in future research.
A Hybrid Six Sigma Dmaic and Fuzzy-FMEA Framework For Defect Reduction and Quality Enhancement In White Copra Production Fatiyah Azzahra; M. Afiq Aznan
Jurnal Riset Ilmu Teknik Vol. 2 No. 2 (2024): September
Publisher : Lembaga Penelitian dan Ilmu Pengetahuan JEPIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59976/jurit.v2i2.113

Abstract

T This study aims to analyze the factors causing defects in white copra products using the Six Sigma (DMAIC) method integrated with Fuzzy-Failure Mode and Effect Analysis (Fuzzy-FMEA). The research method includes collecting production data, calculating Defects Per Million Opportunities (DPMO), determining the sigma level, and analyzing the root causes through cause-and-effect diagrams and risk assessment using Fuzzy-FMEA. The results show that the average sigma level of the process is at 3.63 with a DPMO value of 16,910, indicating that process performance still needs improvement. The dominant factors causing defects include unstable drying temperature, storage humidity, oven machine damage, and operator skill variation. The highest priority risks identified were drying temperature and humidity control, which directly impact the quality of the final product. The practical implications of this study are the need to implement mechanical drying with automatic temperature control, operator training programs, preventive oven maintenance, and standard operating procedures (SOPs) in quality control. This study contributes to strengthening empirical evidence of the application of DMAIC combined with Fuzzy-FMEA in agroindustry, particularly in coconut processing, and serves as a reference for improving product quality based on a quantitative and fuzzy logic approach.
Integrating Quality Function Deployment (QFD) In The Hygienic Oil-Draining Tools For Msmes: a Consumer-Centered Approach Damas Aulia Nata; Hamdan, Hamdan; Rama Haiban, Ryando
Jurnal Riset Ilmu Teknik Vol. 2 No. 2 (2024): September
Publisher : Lembaga Penelitian dan Ilmu Pengetahuan JEPIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59976/jurit.v2i2.118

Abstract

Purpose – This study aims to design an oil-draining spinner tailored for Micro, Small, and Medium Enterprises (MSMEs) using the Quality Function Deployment (QFD) approach to ensure ergonomics, hygiene, and consumer-oriented innovation. Design– A quantitative descriptive design was applied, involving observations, interviews, and structured questionnaires with 10 MSME owners in fried food production. Consumer requirements were systematically translated into technical attributes through the House of Quality (HOQ). Reliability and validity testing were conducted, followed by concept screening and scoring to determine the optimal design. Findings – The results highlight that consumers prioritize minimalist size, multifunctionality, durability, and ease of cleaning. Correlation analysis revealed strong relationships between consumer needs and technical attributes, with system effectiveness and process stability being the most influential. Comparative evaluation of design alternatives identified a hybrid material combination of wood and heat-resistant plastic as the most feasible solution, offering balance between functionality, hygiene, and ergonomics. Practical implications – The findings provide MSMEs with a practical tool to improve food safety, durability, and competitiveness. The results also serve as a reference for policymakers in supporting MSME innovation through affordable, consumer-driven technologies. Originality/value – Unlike previous studies limited to prototypes, this research integrates consumer validation into QFD-based design, bridging gaps between technical feasibility and real-world MSME applications.

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