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All Journal Emerging Science Journal Jurnal Teknik Industri : Jurnal Hasil Penelitian dan Karya Ilmiah dalam Bidang Teknik Industri Jurnal Papatung : Jurnal Ilmu Administrasi Publik, Pemerintahan dan Politik Engineering, Mathematics and Computer Science Journal (EMACS)
Harito, Christian
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Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering Mathematics Social Sciences

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Integration of QFD, HOQ, Taguchi, and Kansei Engineering for Smart Desk Lamp Design Barus, Maranatha; Harito, Christian
Engineering, MAthematics and Computer Science Journal (EMACS) Vol. 6 No. 3 (2024): EMACS
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/emacsjournal.v6i3.12136

Abstract

This research focuses on the analysis of smart desk lamps. To the authors’ knowledge, there is no previous study about Voice of Customer regarding smart desk lamps in Indonesia, to know the requirements for a smart desk lamp from Indonesian customer using the QFD and House of Quality (HOQ) The overall value of the interaction matrix with HOQ, the relative weight results for each customer and functional requirements are obtained. The highest technical requirement from HOQ is automatic on/off. The Taguchi method is to find out the best design for each Kansei Engineering that has been created. The Kansei Engineering that have been created are easy to use, adjustable lamp, affordable price, modern design, hi-tech. Each Kansei Engineering produces the required design according to the S/N Ratio (signal to noise ratio). Based on the QFD questionnaire and design using Kansei Engineering, one best design was obtained, namely hi-tech. The design consists of 3 parts, namely the top, middle and bottom. At the top, the slim rectangular shape is preferable with lights position in the middle. Pole position is round, upright position. At the bottom, it has a circular shape.
Cost-Effective Manufacturing of Microfluidics Through the Utilization of Direct Ink Writing Prajitna, Stefanus H.; Harito, Christian; Yuliarto, Brian
Emerging Science Journal Vol 9, No 1 (2025): February
Publisher : Ital Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/ESJ-2025-09-01-01

Abstract

Microfluidics is essential for precise manipulation of fluids in small channels. However, conventional manufacturing processes for microfluidic devices are expensive, time-consuming, and require specialized equipment in a clean room. While recent studies have improved the cost-effectiveness of this device, there is still a need for further advancement in cost efficiency. Therefore, this study aimed to develop a custom-built direct-ink writing (DIW) printer for manufacturing microfluidic devices that is more affordable. Custom-built DIW directly printed microfluidic channels onto microscope slide glass using RTV (Room Temperature Vulcanizing) silicone sealant. To finish the microfluidics manufacturing, the printed channel will be assembled by placing the same glass on top of the printed layer. This method eliminated the need for polydimethylsiloxane (PDMS) molds and casting processes that were still found in recent studies. This innovative $250 (USD) custom-built DIW method takes 15 seconds to print microfluidics channels and showed a significant cost reduction, with each microfluidics device costing only $0.071 (USD) compared to $0.90 (USD) in previous studies. This study makes microfluidics more affordable and accessible for biomedical use. Doi: 10.28991/ESJ-2025-09-01-01 Full Text: PDF
Enhancing Efficiency in Industrial Metal Roof Replacement: Utilizing Goal Programming for Cost Optimization Sutanto, Wilson; Prajitna, Stefanus Hanifa; Harito, Christian
JTI: Jurnal Teknik Industri Vol 10, No 1 (2024): JUNI 2024
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/jti.v10i1.29476

Abstract

This study explores the use of Goal Programming (GP) to optimise project management decisions in the construction industry, focusing on a case study of a roof replacement project. The construction industry is crucial to a country's development, contributing significantly to economic growth and employment rates. However, construction projects are often complex and resource-intensive. Project management is essential in ensuring the successful completion of construction projects. The study uses GP to address the time-cost trade-off in project management, aiming to minimise project costs while meeting project deadlines and quality requirements. The GP model considers various constraints, such as the availability of workers and equipment, project duration, and budget limitations. The study presents two optimisation options: a time-focused option and a cost-focused ed option. The time-focused option prioritises timely project completion, while the cost-focused option aims to minimise project costs. In the case study, the time-focused option is the most suitable choice. This approach allows the project to be completed in time as the alternative option delay delays the project far too unacceptable. Overall, the study demonstrates the effectiveness of GP in optimising project management decisions in the construction industry. By carefully evaluating project constraints and objectives, GP can help construction companies achieve the best possible outcomes in terms of cost, time, and quality. Keywords: Goal Programming, Construction Industry, Project Management, Time-Cost Trade-off, Optimization
Use Case Diagram for Enhancing Warehouse Performance at PT. MDA Through the Implementation of 5S, Economic Order Quantity, Safety Stock, and Warehouse Management System Kurniawan, Michael Radius; Hadiyanto, Hadiyanto; Zulkarnaen, Joe Daniansyah Pahlevi; Harito, Christian
Engineering, MAthematics and Computer Science Journal (EMACS) Vol. 6 No. 1 (2024): EMACS
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/emacsjournal.v6i1.11204

Abstract

An industrial water pump importing company relies on a network of distribution warehouses to efficiently manage the storage and delivery of its products to clients. This paper delves into the operational intricacies of the company, with a primary focus on sustaining a superior level of service to meet customer demands, all while attempting to minimize costs and achieve optimal inventory control. The central aspects explored in this research encompass the meticulous determination of the number of pipes needed and the optimal ordering times. To address this, the Probabilistic Economic Order Quantity (EOQ) method is used and supported by 5S concept, recognized for its ability to provide reasonably accurate estimates crucial for pivotal decision-making in inventory management. The utilization of the Probabilistic EOQ method in this context reflects the company's commitment to adopting sophisticated and proven methodologies to enhance decision-making accuracy and the warehouse area is more suitable by the 5S implementation principles. The research outcomes not only assist in refining the determination of Safety Stock levels but also contribute valuable insights into the precise quantities of goods that should be ordered. With an estimated demand for 196 units of carbon 6" in the following year, a safety stock of 13 units is required, while for carbon 4" with an estimated demand of 119 units, a safety stock of 8 units is required. These upcoming insights could encompass innovative strategies, technological implementations, or advances in supply chain optimization.
Comparison HOR and AHP Methods in Risk Mitigation of Line Pipe Procurement Kholid, Muhammad Arwan; Harito, Christian
Engineering, MAthematics and Computer Science Journal (EMACS) Vol. 6 No. 2 (2024): EMACS
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/emacsjournal.v6i2.11320

Abstract

OCTG (Oil Country Tubular Goods) is a type of pipe used for oil and gas exploration activities. To meet the demands for the fulfillment of Line Pipe material needs at PT Pertamina EP. The results of the analysis and identification of risk factors from 3 Subjet Matter Expert (SME) in Line Pipe material procurement activities. From 13 Process Activities, 16 Risk Events (Ei) and 35 Risk Agents (Aj) were obtained. In House of Risk (HOR) 1, the results of the calculation of the Aggregate Risk Potentials (ARPj) value of 35 Risk Agents (Aj), the highest Aggregate Risk Potentials (ARPj) with a value of 810. In House of Risk (HOR) 2, the results of the calculation of the Effectiveness to Difficulty ratio (ETDk) value of 4 Preventive Action (PAk), the highest Effectiveness to Difficulty ratio (ETDk) value with a value of 4860. In the Analytic Hierarchy Process (AHP), the results of the calculation of the Consistency Ratio value of 5 Criteria Weight the highest Criteria value with a percentage of 45.4% and the Consistency Ratio of 4 Alternatives the highest Alternative value with a percentage value of 44.06%. The best alternative solution in the selection of mitigation strategies for contract type selection is “TFC (Technical Framework Contract)” with the highest percentage and value. The TFC (Technical Framework Contract) contract type is in accordance with the PTK-007 Revision 5 Chapter IV Contract guidelines.
OPTIMALISASI TEKNIK LESS WATER DYEING PROGRAM PADA KAIN POLYESTER DENGAN PENDEKATAN METODE TAGUCHI UNTUK PENGHEMATAN AIR DALAM INDUSTRI TEKSTIL Wahyudi, Yohan; Harito, Christian
PAPATUNG: Jurnal Ilmu Administrasi Publik, Pemerintahan dan Politik Vol 6 No 2 (2023): PAPATUNG Volume 6 Nomor 2 Tahun 2023
Publisher : GoAcademica Research dan Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54783/japp.v6i2.898

Abstract

Industri tekstil, sebagai penyumbang limbah cair terbesar kedua di dunia setelah industri minyak dan gas, menghadapi tantangan serius terkait penggunaan air dan bahan kimia dalam proses pencelupan. Tujuan penelitian ini adalah untuk mengoptimalkan teknik Less Water Dyeing Program pada kain polyester dengan menggunakan metode Taguchi, dengan fokus utama pada efisiensi penggunaan air dalam proses pencelupan, penghematan biaya produksi, dan pengurangan dampak negatif lingkungan akibat proses pencelupan. Metode penelitian terdiri dari dua tahap utama. Pertama, menerapkan teknik Less Water Dyeing dengan mengubah tahap rinsing menjadi cooling, sebuah modifikasi pada proses pencelupan tradisional untuk mengoptimalkan penghematan air. Kedua, menggunakan metode Taguchi untuk melakukan pengoptimalan parameter-proses, termasuk tipe mesin, volume air, berat kain, dan tingkat reduksi. Hasil penelitian menunjukkan bahwa Less Water Teknik berhasil menghemat air hingga 60% dengan metode cooling, meningkat menjadi 72.4% melalui optimalisasi metode Taguchi. Kombinasi kedua teknik ini memberikan penghematan yang signifikan, mengurangi biaya proses pencelupan tanpa mengorbankan kualitas hasil, dengan nilai penghematan mencapai 666,717,120 per tahun. Teknik Less Water Dyeing Program dengan metode Taguchi, khususnya dengan peningkatan pada tahap cooling, terbukti sebagai solusi efektif untuk meningkatkan efisiensi penggunaan air dalam proses pencelupan, menghemat biaya produksi pencelupan, dan mengurangi dampak negatif lingkungan akibat proses pencelupan tekstil.
Co-Authors Barus, Maranatha Brian Yuliarto Hadiyanto Hadiyanto Kholid, Muhammad Arwan Kurniawan, Michael Radius Prajitna, Stefanus H. Prajitna, Stefanus Hanifa Sutanto, Wilson Yohan Wahyudi Zulkarnaen, Joe Daniansyah Pahlevi