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All Journal JISI UMJ (Jurnal Integrasi Sistem Industri UMJ) Jurnal Sistem dan Manajemen Industri JURNAL REKAYASA SISTEM INDUSTRI SABDAMAS Jurnal Pengabdian Masyarakat Charitas Metris: Jurnal Sains dan Teknologi
Silalahi, Agustinus
Universitas Katolik Indonesia Atma Jaya
Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Public Health Social Sciences Transportation

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USULAN PERBAIKAN KUALITAS PAINTING BOOTH DENGAN METODE SIX SIGMA PADA PT. FOSTA UNGGUL PERDANA Sukwadi, Ronald; Wibowo, Alfian Adhi Setyo; Silitonga, Riana Magdalena; Widawati, Enny; Silalahi, Agustinus; Thu, Nguyen Thi Bich
JISI: Jurnal Integrasi Sistem Industri Vol. 12 No. 2 (2025): JISI UMJ
Publisher : Fakultas teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jisi.12.2.153-166

Abstract

PT. Fosta Unggul Perdana merupakan salah satu perusahaan yang bergerak dalam bidang manufaktur khusus dalam pembuatan painting booth. Tujuan dari penelitian ini yaitu membuat sebuah metode perbaikan di mana dapat mengetahui jenis – jenis kecacatan dan tingkat kecacatan yang terjadi pada proses produksi di PT. Fosta Unggul Perdana. Di mana metode yang digunakan pada penelitian ini yaitu menggunakan metode Six Sigma. Metode yang digunakan yaitu melakukan pengumpulan data, yang hasilnya yaitu ditemukan 5 kecacatan yang terjadi pada proses produksi painting booth pada perusahaan yaitu kecacatan salah melubangi material, kecacatan salah menekuk material, kecacatan pengelasan tidak rapih, kecacatan penghalusan tidak rapih, dan kecacatan salah dalam pemasangan benda dalam perakitan akhir. Dengan tingkat kecacatan yang cukup banyak, maka metode perbaikan akan menggunakan Six Sigma guna memudahkan dalam menjabarkan dan menganalisa tiap kecacatan yang terjadi dan dapat mengetahui aspek mana yang paling sering terjadi cacat dalam proses produksi. Dengan menggunakan Six Sigma, diketahui untuk nilai Sigma yang diperoleh sebelum dilakukan perbaikan yaitu sebesar 3,144 Sigma dengan Nilai DPMO (Defect Per Million Opportunities) sebesar 50.133,11. Berdasarkan hasil tersebut, dibuat sebuah perbaikan dengan menggunakan salah satu tools yaitu FMEA dan juga pembuatan SOP baru sehingga setelah dilakukan penerapan pada perusahaan nilai Sigma dari sebelumnya 3,144 Sigma meningkat menjadi 3,625 Sigma dengan Nilai DPMO (Defect Per Million Opportunities) yang turun dari yang sebelumnya 50.133,11 menjadi 16.800.
Sosialisasi Pemanfaatan Aplikasi Kuesioner ATD Dan Likert Untuk Penelitian Survei Kuantitatif Goenawan, Stephanus Ivan; Vivi Triyanti; Hutahaean, Hotma Antoni; Wibawa Prasetya; silalahi, Agustinus
Jurnal Pengabdian Masyarakat Charitas Vol. 4 No. 02 (2024): Jurnal Pengabdian Masyarakat Charitas
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/charitas.v4i02.6014

Abstract

Using technology in quantitative research is increasingly important to improve the efficiency and accuracy of data collection. This community service activity aims to socialize the use of questionnaire applications based on the Data Weigher Analysis (DWA) and Likert methods that can be used in quantitative survey research. Socialization is carried out to researchers, academics, and students involved in survey-based research to facilitate understanding and skills in designing, distributing, and analyzing questionnaires digitally. Through this activity, participants are given direct training on using the application, the advantages of the DWAand Likert methods in measuring quantity values into quality, and efficient and accurate data processing. The evaluation results showed that participants had increased understanding and skills in utilizing the questionnaire application, which is expected to support more effective quantitative research in the future. Thus, this activity contributes to increasing researchers' capacity to conduct modern and technologybased quantitative surveys.
Pendekatan Metode Tiga Fase dalam Optimasi Masalah Rute Kendaraan dengan Varian Jenis Kendaraan dan Jenis Produk Natalia, Christine; Silalahi, Agustinus; Khantidevi, Jessica
Metris: Jurnal Sains dan Teknologi Vol. 18 No. 02 (2017): Desember
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

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Abstract

SClustering is a commonly system used by the distribution company. Some consumers who are in the same location but located in two different clusters as a result of a fixed and rigid area within cluster, resulting in longer delivery time and higher cost incurred to deliver the order. The purpose of this research is to determine the optimal vehicle route using three-phase method approachthat improve the clustering system. Complexity arising from the problem of this vehicle routing includes variant types of vehicles and variants of product types. The three-phase method includes a cluster-making phase with a maximum distance between consumers within 10 kilometers, a cluster adjustment phase, and a routing phase that determine shipping routes and calculate total distribution cost. Numerical examples shows that the cost of distributing goods can be minimized, from an average of IDR 1,064,408.33 to an average of IDR 775,586.46. Thus a three-phase method may improve the clustering system by reducing distribution time and cost.
Proposed Factory Area Location Alternative Selection Based on Multiple Criteria Decision Making Using Analytical Hierarchy Process Method (Case Studi PT. SKI) Magdalena, Riana; Silalahi, Agustinus; Fendi, Su
Metris: Jurnal Sains dan Teknologi Vol. 19 No. 02 (2018): Desember
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

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Abstract

PT. SKI is a manufacturing company engaged in the production of hair and skin beauty products such as hair masks, shampoos, conditioners and others. Demand for beauty products that are increasing every day requires companies to produce more than inventory. One solution is to expand the production area in an increase large-scale production processes. However, the current production area which cannot optimally support this due to the absence of vacant land or expansion of the area that can be carried out. Based on the results of interviews with the head of the production section, the plan to move locations in several alternative places is the right solution for the company. In the specific task studied, the need for this location transfer will be related to multiple decision making taken by the company. One technique to identify these problems is using the Analytical Hierarchy Process or AHP method where this method is a simplification of complex problems that are not structured, strategic, and dynamic into their parts, and organize in a hierarchy. The level of importance of each criterion that supports decision support is relatively compared to other criteria by considering various considerations and then synthesizing to determine criteria that have high priority and play a role in influencing the results of the system. Based on the results, it is found that there are several criteria which plays an important role in the selection of factory location alternatives obtained in the mathematical equation. The first criterion namely Investment and Operations has a value of around 55.84% indicating that the first best alternative location in the sub criteria is land price, land area, expansion and employee salaries (UMR). Continued around 58.47% in the second general criteria, namely facilities with sub criteria of water, electricity, transportation and service which showed the best selection was in the first location alternative and 73.51% in the criteria for ease of licensing and transportation access at the first alternative location. By comparing the three data multiplication matrices and assessment criteria, it was found that a large comparison of the three general criteria had a total of 60.91% of the first alternatives being the priority of PT. SKI to choose the location of the new factory area, which is located in Padurenan, Gunung Sindur, Bogor, West Java.
Optimasi Pengiriman Sapi Potong pada Jaringan Pelayaran Kapal Khusus Ternak dengan Algoritma Genetika Natalia, Christine; Setiadi, Ghea Ghoniyyah; Silalahi, Agustinus
Metris: Jurnal Sains dan Teknologi Vol. 20 No. 01 (2019): 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.v20i1.2393

Abstract

The government livestock carrier cruise program is a dedicated program to improve the supply chain management of livestock and the ultimate goal is selfsufficiency of beef in 2026. This carrier has one fleet with the capacity of 500 cows and sails through 8 ports regularly. The island of Nusa Tenggara are the local producers for the livestock carrier cruise which is an area of provincial surplus of beef. For the future the government plans to add more ships to the armada from the current one fleet to six fleets of livestock carrier cruises. The current livestock carrier cruise program has not been optimal in shipping cows to the consumer area. This is caused by the limitation of number of fleet and theexisting route that the livestock carrier has to sail through has created some obstacle to maximizing the number of cows to be distributed. This research aims to optimise this carrier cruising route with criteria including having high supplied beef percentage rate and having the most minimum cost. This optimisation problem solved by genetics algorithm methid and develop twodifferent scenarios that suggest alternatives for an optimal route. To make things easier, a computerized program with genetics algorithm method for a livestock carrier cruise optimization network are designed. The outcome of this research is a proposed optimised route on scenario 1 with total cost of Rp 443,306,533.26, and total load of 1,374 cows. As for the future to add five ships, the conditions are met by using the results of the second scenario with total cost of Rp 1,321,505,850.62, total load of 3416 cows and the route network for six ships
OPTIMASI ALOKASI SISTEM PENGOLAHAN SAMPAH ANORGANIK DENGAN METODE CAPACITATED MAXIMUM COVERING LOCATION PROBLEM Silalahi, Agustinus; Zefanya, Eva Angelica; Natalia, Christine; Prasetya, Wibawa
Metris: Jurnal Sains dan Teknologi Vol. 23 No. 01 (2022): 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.v23i01.3224

Abstract

Province X in Indonesia has a significant problem with trash that has been challenging to address. The Environment Agency therefore desires to construct an inorganic Trash Management System. The Environment Agency has four potential locations with various capacities. The purpose of this research is to locate a trash treatment system's best possible site and allocate each TPS that is less than 30 km and more over 30 km from the chosen system, respectively, to ensure that the overall distance traveled is as little as possible. There are four possible locations, and it required to select three of them. This study use the LINGO 18.0 software to solve the Capacitated Maximum Covering Location Problem (CMCLP) approach. Distance parameters used by CMCLP are split into two stages. The first stage is to determine the location of the trash treatment system to be built and the allocation of trash and the amount of trash from each TPS using Mix Integer Programming. B is not chosen out of the options, which are A, B, C, and D. System A will receive 1,407,520 tons of trash totaling 24 TPS. System C receives trash from 147 TPS weighing 1,294,495 pounds. System D will receive trash weighing 819,142 tons from 88 TPS. The allocation of trash from TPS that are more than 30 km away takes place in the second stage. Three TPS are assigned to System A, and seven TPS are assigned to System D.
PENJADWALAN PERAWAT BERDASARKAN MINIMASI PELANGGARAN PERATURAN DAN MINIMASI BIAYA LEMBUR Silalahi, Agustinus; Lydia, Antonia; Natalia, Christine; Prasetya, Wibawa
Metris: Jurnal Sains dan Teknologi Vol. 23 No. 02 (2022): 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.v23i02.3896

Abstract

The high overtime cost for nurses from Manual Scheduling, in the inpatient unit at ABC Hospital, where the overtime cost was Rp.10,409,910,-, much the difference number working hours between each nurses and many violations of hard constraint. So, it is necessary to make improvements to the scheduling. This study developed the scheduling whose goal is to minimize violations of regulations and minimize overtime costs by Goal Programming (GP). Mathematical formulation for both objectives were solved by LINGO 18.0. The difference in the number of working hours between the highest working hours and the least working hours for nurses who are not on leave, on Manual Scheduling, The Minimizing Regulatory Violations Scheduling and The Minimizing Overtime Costs Scheduling were 53, 0 and 1 hour(s) respectively. The highest number of working hours was 221 hours in Manual Scheduling, while the least number working hours was 175 hours in Minimizing Overtime Scheduling. If the policy in scheduling wanted to minimize violations, using the result of Scheduling for Minimizing Violation of the regulations there were 177 violations and overtime costs was Rp. 3.652.600,- reduced by 64.91%. Meanwhile, if the Hospital wanted to minimize overtime costs, using the result of Scheduling Minimizing Overtime Costs, there were 246 violations and overtime costs was Rp.104,360,- reduced by 99.0%.In the future, the hospital must establish a policy in terms of scheduling, whether the aim is to minimize violations of regulations or minimize overtime costs, so that based on this policy, the mathematical formulation can be determined.
Usulan Perbaikan Tata Letak Gudang Pendingin yang Memaksimalkan Daya Tampung dan Meminimumkan RataRata Jarak Perpindahan (Studi Kasus PT. XYZ) Hidayat, Trifenaus Prabu; Yanuwar, Aliffian; Silalahi, Agustinus
Metris: Jurnal Sains dan Teknologi Vol. 24 No. 01 (2023): 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.v24i01.4300

Abstract

PT. XYZ’s Cold Storage that is located in the Pelabuhan Perikanan Samudera Nizam Zachman Jakarta currently does not implement a storage layout system, the are randomly placed, even an empty area near the door is not utilized to put the commodity to be stored. Causing the forklift mileage to grow larger. In addition, the demand for cold storage is increasing from year to year so that cold storage should be increased current capacity, cold storage is currently able to accommodate 575 pallets. The increase in cold storage capacity is done by combining the storage flow, pallet laying position, as well as the layout method of class based storage, dedicated storage, and random storage. The combination of these three factors resulted in 18 possible proposals for the improvement of the cold storage layout. From the 18th combinations likely to be taken one combination of layouts by considering three criteria i.e. maximum capacity, minimum distance, and maximum revenue gained from maximum capacity. Proposal layout with a combination of pallet widened position, simple straight groove, with dedicated storage method to be the best proposal with a maximum capacity of 750 pallets, the minimum distance of 5728.82 m, and the company can earn a maximum income of Rp 297 million per month with the capacity.
Penjadwalan staf PT. Adi Sarana Logistik Divisi Outbound Unit Picker dan Dispatcher berdasarkan Minimisasi Jam lembur Silalahi, Agustinus; Heryanto, Timotius; Hidayat, Trifenaus Prabu; Hutahaean, Hotma Antoni; Indriati, Kumala
Metris: Jurnal Sains dan Teknologi Vol. 24 No. 02 (2023): 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.v24i02.4733

Abstract

PT. Adi Sarana Logistik (PT ASL) is a company engaged in the warehouse and logistics sector, which delivers many packages daily. Previously, manual scheduling took a long time, and there were violations of working hours regulations. The research was conducted at the outbound division, in picker and dispatcher units for leaders and operational staff, where the number of operational staff varies each month, so there are four schedules were produced where this study aims to minimize overtime hours for each level of staffs and units by Goal Programming and Binary Integer Programming which are completed with LINGO 18.0. The results of this study have been implemented in the company, where the schedule only takes a few seconds, while previously, it took 1-2 days. The scheduling carried out in this study is in October 2022, where all employees for leaders and staff in each unit have 22 working days, nine days off, 1 hour of overtime, and follow the rules.
Persepsi Pengguna Sebagai Dasar Pengembangan Model Usability Aplikasi Mobile Commerce Hutahaean, Hotma Antoni; silalahi, Agustinus; Prabu Hidayat, Trifenaus; Sukwadi, Ronald; Kartawidjaja, Maria Angela
Metris: Jurnal Sains dan Teknologi Vol. 25 No. 01 (2024): 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.v25i01.5451

Abstract

The intense competition between developers, resulting in efforts to determine users' needs, is increasingly important. Usability An application can affect the continuity of application use. In this study, the user's loyalty is also used to analyze usability. This study examines user perceptions about user interaction characteristics when interacting with the mobile commerce application and considers users' loyalty. This research is essential to find out the needs of users of a mobile commerce application, which can be input to the developer in the design stage. This study uses 149 respondents' online shopping transactions in Jabadetabek and outside Jabodetabek, Indonesia. Data were analyzed using the Structural Equation Modeling (SEM) model. The results showed that users' perception of effectiveness, satisfaction, and learning influenced usability. This model can explain 42.6% of the user's usability variation when using it. This model can explain the usability of the Mobile Commerce application quite well. As a practical implication, this study shows the factors that support the characteristics of user interaction and application systems at the stage of defining the requirements for developing mobile commerce applications.
Co-Authors Adrian, Bryan Chendrasari Wahyu Oktavia Christine Natalia Chyntia, Marcellina Damasputra, Albertus Nugi Prasetya Enny Widawati Fendi, Su Ghea Ghoniyyah Setiadi Goenawan, Stephanus Ivan Heryanto, Timotius Hotma Antoni Hutahaean Hutahaean, Hotma A. Indriati, Kumala Jessica Khantidevi Khantidevi, Jessica Lictyawati, Marcellina Cynthia Lydia, Antonia Maria Angela Kartawidjaja Maria Magdalena Melisa Mulyadi Octaviani B.W., Sandra Pramesjwari, Duhita Al Hayyu Riana Magdalena Rippun G.M., Ferry Ronald Sukwadi Setiadi, Ghea Ghoniyyah Su Fendy Sugioko, Andre Suwasto, Febian Thu, Nguyen Thi Bich TIUAJ, Yanto Trifenaus Prabu Hidayat Veronica Windha Mahyastuty Vivi Triyanti Wahju, Marsellinus Bachtiar Wibawa Prasetya Wibowo, Alfian Adhi Setyo Yanuwar, Aliffian Zefanya, Eva Angelica