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Metris: Jurnal Sains dan Teknologi
Published by Universitas Katolik Indonesia Atma Jaya
ISSN : 14113287     EISSN : 28084810     DOI : https://doi.org/10.25170/metris
Core Subject : Science, Education, Engineering,
Decision Sciences, Operations Research & Management Education Engineering Industrial & Manufacturing Engineering
Jurnal Metris is published 2 (twice) a year. Since Volume 14 in 2013, Jurnal Metris has been published in June and December. The contents of the journal discuss research results in the field of industrial engineering. Jurnal Metris provides a place of publishing for sharing the new findings from research results of researchers, academics, scientists, and practitioners who related to the scope (but not limited) of: 1) Smart Production; 2) Lean Manufacturing; 3) Product Design & Development; 4) Human Factors Engineering; 5) Management Science and Operation Research; 6) Logistics and Supply Chain Management; 7) Decision Science in Business and Management; 8) Quality Engineering.
Arjuna Subject : Teknik (semua kategori) - Tenik Industri dan Manufaktur
Articles 194 Documents
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Agen Based Modeling for Corn Supply Chain Risks Identification and Sales Negotiation in PTPN VIII Hidayat, Syarif; Suliandar, Dyah Ayu
Metris: Jurnal Sains dan Teknologi Vol. 21 No. 01 (2020): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v21i01.2427

Abstract

PTPN VIII is a state-owned company in West Java cultivating several kinds of commodities, and still have three marginal farmlands with a total size of 3000 hectares open for investment for corn. The type of corn that would be produced is corn feed for poultry needs. Three agents are involved in this agent-based model: the farmers (or cooperatives), PTPN VIII, and the buyers of the corn yields. All agents face risks in doing their businesses which hamper or reduce their probability of achieving their business goals. The potential risks are identified using fuzzy reasoning method. The three blocks of farmland have different levels of fertility. Farmers are expected to compete for the hunt of farmland to rent for cultivating corns, until their funds run out. They must prepare the land, procure their best corn seeds, plant and maintain the crops, and eventually harvest, dry and sell their corn yield. The dryness of the corn grains dictates the selling price. The buyers will buy the corns until their demands are fulfilled for the particular season. There will be a negotiation process between agents to reach an agreement. Each agent seeks to achieve its goal. This is why agent-based modelling is employed. Netlogo software is used to develop the model. Based on fuzzy reasoning method the obtained result shows that the most potential risk is quality risk. The negotiation results show that when both buyer and seller experience heightened degree of risk appetite, the shortest negotiations are achieved.
Analisis Kenyamanan Termal Ruang Kuliah Hadi, Yuswono; Azaria, Tabitha; ., Purnomo; Putrianto, Novenda K.; Oktiarso, Teguh; Ekawati, Yurida; Noya, Sunday
Metris: Jurnal Sains dan Teknologi Vol. 21 No. 01 (2020): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v21i01.2428

Abstract

Bhakti Persada Building is one of the main buildings at Ma Chung University that serves as a place for the lecture process and student activities. Every room of Bhakti Persada Building has an AC that is on every day and there are very adequate windows and vents. The study aims to provide thermal comfort to the space users by measure temperature, humidity, and wind speed before and after the engineering of space facilities using SNI 6390: 2011 for temperature and humidity as well as the MENKES No.261 / MENKES / SK / 11/1998 standard for wind speed. In addition, this study was also conducted by paying attention to environmental issues, especially energy utilization, so that later it will be obtained scheduling to use of air conditioners as well as the efficiency of the use of electrical energy after the engineering of space facilities. The results of thermal comfort analysis after engineering the room facilities, obtained the time zone of the lecture room using a propeller fan is the time zone I and II for all sizes of lecture rooms while for time zone III all lecture rooms will use air conditioning because the temperature increases ± 0, 5 ° C, and for time zone IV lecture rooms with sizes 5 x 9 m, 6 x 9 m and 8 x 9 m the second floor will use a fan and a room size 8 x 9 m and 10 x 9 m third floor will use AC. After the engineering of space facilities, it was also found that the efficiency of the use of electrical energy in the lecture hall of the Bhakti Persada Building was 53%.
A Survey of the Thickness of the Shoe Sole among Junior High School Students in Greater Jakarta for Shoe Correction in Seat Height-Popliteal Height Equation ., Yanto
Metris: Jurnal Sains dan Teknologi Vol. 21 No. 01 (2020): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v21i01.2429

Abstract

This paper aimed to present a survey result of the thickness of the shoe sole among junior high school students in Greater Jakarta, Indonesia. A number of 160 samples of the shoe wearing by junior high school students (85 boys and 65 girls) from Grade 7-Grade 9 was measured. The thickness of the sole of the shoe wearing by them were measured. The results were presented in mean and SD for each grade and gender. T-test results showed that no significant differences were found for thickness of the sole of the shoe wearing by boys and girls within the same grade. Anova test results also revealed that no significant differences were found for thickness of the sole of the shoe among boys in Grade 7-9 (F=0.54, p=0.58) and girls (F=1.06, p=0.35). Findings in this study revealed that a 20mm shoe correction, as often used by many researchers, which is added to the popliteal height to dimension the seat height (SH) is appropriate to be used for population under study. The results of this study provided sufficient justification for the use of a 2 cm shoe correction (SC) in addition to popliteal height when determining seat height of the chair.
Rancang Bangun Alat Sentrigufal Pencuci Daging Buah Kelapa Menggunakan Cairan Air Kelapa (Pre-Processing Metode Sentrifugasi) Santosa, Hadi; ., Yuliati; Mulyana, Ig. Jaka
Metris: Jurnal Sains dan Teknologi Vol. 21 No. 01 (2020): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v21i01.2430

Abstract

The diversification of the coconut processing industry into Virgin Coconut Oil (VCO) as a more prospective coconut derivative is currently still growing rapidly. VCO is a virgin coconut oil product that is beneficial for health, and can be used as a raw material for natural cosmetics which has high economic value. Preliminary research has successfully designed the construction of a coconut husk peeler and a coconut shell breaker machine as an early stage in the VCO production process technology. The discussion of this paper covers the design of a coconut meat washing machine utilizing coconut water which consists of a rotating tube with an adjustable tube rotation speed with an inverter and an electric motor as the driving force equipped with a high pressure nozzle with ± 75 psi pressure. Inside the tube there is a retaining divider that regulates the flow of the washed coconut meat. The washing process uses coconut water to wash coconut meat in a washing tube that rotates at a certain speed as needed with a capacity of 8 kg timer for ± 3-5 minutes. Coconut water is drained and coconut meat is ready for the next process.
Self-Management Team Pemeliharaan Perangkat Layanan Telekomunikasi Seluler Rosimah, Siti
Metris: Jurnal Sains dan Teknologi Vol. 21 No. 01 (2020): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v21i01.2431

Abstract

The services of cellular telecommunication companies are very complex and should be available any times. To deliver services used equipment that complexity and properly all the times and the system not damage or function of degradation. Therefore, the equipment maintained the network system that properly to function at any time. To maintain the equipment required the autonomous maintenance team in maintenance activities. Self-management team as a teamwork concept approach that explored maintenance activities of equipment telecommunication
Portfolio Optimization in Post Financial Crisis of 2008-2009 in the Mongolian Stock Exchange Lee, Cheng-Wen; Gankhuyag, Dolgion
Metris: Jurnal Sains dan Teknologi Vol. 21 No. 01 (2020): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v21i01.2432

Abstract

In this study, we present the Mongolian stock market’s performance post phenomenal financial crisis of 2008-2009, opportunities to invest and the risks problems. For analysis of the study, we used financial portfolio optimization models with restricted structure, mathematical statistic methods and financial methods. First, we considered about portfolio optimization in the Mongolian Stock Exchange using Markowitz’s modern portfolio theory and Telser’s safety first model. We used MSE weekly trading data chosen 50 most traded stocks out of 237 stocks listed at the MSE between 2009 and 2013. We generated 50 weeks mean-variance portfolio and safety first portfolio for 2014 and discussed. We considered weekly investment in the MSE using mean-variance portfolio andsafety first portfolio. The mean-variance portfolio has the best performance of weekly portfolio return with average weekly return and cumulative return. We found stable portfolio against investing risk and did back-test the result. For prospect investors in the MSE, we suggest invest and earn high return in the MSE.
Optimasi Green Productivity pada Industri Karet di PT. X Palembang Rosyidah, Masayu; Sholekah, Lihatus; Oktarini, Devie
Metris: Jurnal Sains dan Teknologi Vol. 21 No. 01 (2020): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v21i01.2434

Abstract

PT. X is a company that processes semi-finished rubber. In its management, the company relies on a number of suppliers of raw rubber. In the production process produces liquid waste. The problem in this research is how to increase company productivity and reduce environmental impact. This study aims to determine the level of company productivity, knowing the EPI index (Environmental Performance Indicator). Methods of conducting research through observation and questionnaires. Based on the results of calculations performed, it shows that the company's productivity is quite good with an average value of 202.56%, while the results of the calculation of the total EPI index are positive because the company has made management efforts in accordance with the applicable provision.
Course Design Based on Students’ English Skill Cluster: A Case Study in a University Language Center Murpratomo, Eldwin Ilham; Kurniawati, Amelia; Anggana, Hilman Dwi
Metris: Jurnal Sains dan Teknologi Vol. 21 No. 02 (2020): Desember
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v21i02.2488

Abstract

The English Proficiency Test (EPrT) is a prediction test for English as a Foreign Language (TOEFL), which is a prerequisite for graduation at XYZ University. The Language Center provides a course for EPrT preparation. The course posttest data shows that only 74% of students met the graduation prerequisites. This study aims to develop an English course design based on the students’ English skill cluster. This study uses the K-Means clustering approach to classify the students based on English skills. The respondents are 397 students who joined the EPrT preparation course in October and November 2018. The 397 students are distributed into 3 clusters, which are 174 students in cluster 1, 116 students in cluster 2, and 107 students in cluster 3. Cluster 1 consists of students with the score below average. Cluster 2 consists of students with the total score above average, but the components score is below average. Cluster 3 consists of students with pre-test total score below average, but the post-test score are above average. Therefore, the EPrT preparation course is suggested to have different levels, instead of one level as now. The course materials are designed to be suitable for students’ initial English skills at each level.
Feasibility Study Using Added Value Calculation Analysis for Palm Oil Supply Chain Hidayat, Syarif; Machmud, Aris; Rizki, Muhammad
Metris: Jurnal Sains dan Teknologi Vol. 21 No. 02 (2020): Desember
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v21i02.2490

Abstract

The Palm Oil Supply Chain (POSC) is a series of companies dealing with materials or products derived from oil palm fresh fruit bunches. The chain is interdependent sequentially and cooperate in the control, management and improvement of the flow of products, money and information from the upstream side to the downstream side. The POSC consists of palm oil seed growers, farmers, traders, CPO factory, refinery factory, distributor/retailers, and consumers. The first party in the chain is the palm oil seed or seedling growers. These growers have a very important role for palm oil farmers because the quality of the seeds determines the quality of further fruits. The aims of this study are to evaluate the feasibility study of growing the seedlings, and measure the sensitivity of the factors to the profitability. By using modified Hayami method for the supply chain, the added value obtained is Rp5.950.227.861 which is 34,73% of the sales. The feasibility analysis calculation with an interest rate of 13.5%, shows the NPV of Rp 38.439.321.865, with the BEP of Rp 828.430.058, while ROI result 78,62%, Payback Periode value 1,27, Modified B/C Ratio 1,69, and IRR 78,33%.
Survei Penggunaan Uji Statistik dalam Penelitian Tugas Akhir Mahasiswa dengan Topik Ergonomi di Prodi Teknik Industri Unika Atma Jaya Jakarta ., Yanto
Metris: Jurnal Sains dan Teknologi Vol. 21 No. 02 (2020): Desember
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v21i02.2491

Abstract

This study presented a survey results of the statistical tools used by undergraduate university students in Department of Industrial Engineering,Faculty of Engineering, Atma Jaya Catholic University of Indonesia. A number of 26 reports of students’ final project from 2018-2020 was identified and studied. A checksheet form was developed to record the 14 statistical tools used by students consists of descriptive statistics (2 items), inference statistics (10 items), multivariate (1 item) and statistical package used (1 item). The data were analyzed for its frequency and percentage. Results showed that all reports used descriptive statistics to present participant’s demography of their research, as well as the summary of statistics. For inference statistics, the students used a variety of normality test, 2 t-test, anova, equal variance, proportion test, a few nonparametric tests, regression and correlation and multivariate statistics. For statistical package, most students used Minitab (46,2%), followed by SPSS (34,4%) and other such as AMOS, Listrel, PLS(15.4%). Among them, 11.5% used more than one software. In addition, the results of this study could be used to evaluate the contents of the relevant course.

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