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OPSI
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : 16932102     EISSN : 26862352     DOI : https://doi.org/10.31315/opsi
Core Subject : Engineering,
Industrial & Manufacturing Engineering
Jurnal OPSI adalah Jurnal Optimasi Sistem Industri yang diterbitkan oleh Jurusan Teknik Industri UPN “Veteran” Yogyakarta sebagai wahana publikasi hasil karya ilmiah, penelitian rekayasa teknologi di bidang Teknik Industri, Sistem Industri, Manajemen Industri dan Teknologi Informasi.
Arjuna Subject : -
Articles 255 Documents
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CNC Programming Software Design to Optimizing Batik Stamping Time Rian Prasetyo; Ainur Komariah
OPSI Vol 14, No 1 (2021): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v14i1.4700

Abstract

Batik is an original Indonesian heritage, that must be preserved and it is the mainstay for implementation of “Making Indonesia 4.0”. It was published many research about stamp batik manufacturing, but still have limitation of motive variation and slackly design process. This research aim to develop the way to making CNC program to be quickly, besides of high variation of batik motive. Source code in python programming language, was built for extension tool in inscape software. Extentension is used to create stamp point, depend on various motive size. Source code created in .py and .inx format will be save in “ekstensi” folder. Based on coordinate point of stamping in stamp batik, CNC program will be created, using “G-code tools” extension that was available in inscape software menubar. CNC programming used extension was built is measured about  time of process and compared to manual CNC programming. CNC program that has been built then tested in CAMotics software. The results of this research show that CNC program could maked with this extension for various dimension od batik stamp and in 2, 4, 6, 8, 10, and 12 meters of cloth length. CNC programming with extension developed, can reduce time up to 96.05%.
Evaluasi Pengendalian Kualitas Kain Grey pada Divisi Weaving Rapier PT XYZ dengan Metode Seven Tools Faisal Ibrahim; Hanif Awandani; Fariza Halidatsani Azhra
OPSI Vol 13, No 2 (2020): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v13i2.3961

Abstract

PT. XYZ is a manufacturing company that produces grey fabrics, it can be customized by the customers. In order to increase productivity and quality production, the company trying to develop business by adding some machines with the latest type and technologies.  Based on direct observations, Company produced a lot of defects and causes a negative impact. The problem can be solved by 4 quality control methods (exist in seven tools method) check sheets, pareto diagrams, control charts, and fishbone diagrams. This method used to determine the root of problems related with the quality products.  Check sheet method analysis shown intensity categories of product defects with label “always”, “often” and “rarely”. Then, the analysis of pareto diagrams showing the most dominant types of defects, with the name “Loncat P / L” and “Ambrol”. Furthermore, the results of the control chart analysis show an uncontrolled status. Finally, it can be known that the problem causing product defects is quality of dirty raw materials, machine failure, labour fatigue, poor work methods and unhealthy environment. recommendations given by researchers to the company are further tighten SOP implementation, control and supervise workforce performance, workforce briefings, and pay attention to 5S work culture.
Redesign of Bus Services Using Quality Function Deployment (QFD) to Improve Services to Passenger (Case Study: PO XYZ) Denny Nurkertamanda; Fakhril Husain; Yusuf Widharto
OPSI Vol 14, No 1 (2021): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v14i1.4747

Abstract

For products in the form of services, customer satisfaction is the most important thing because consumers see services from what other consumers say. As with the PO XYZ also use service which relies on passenger satisfaction. PO XYZ have an experience in reduced consumer satisfaction and with the competitor rise the passenger turn to another competitor. Because of this, it is necessary to conduct this research, for winning customer PO XYZ heart by listening passenger desires. This research used Quality Function Deployment (QFD) which only reached the second phase. Data collection through open passenger questionnaires. In the first phase, product planning, it was found that cleanliness of the bus was a major factor that had to be addressed by PO XYZ of 9.477%. The first phase output in the form of technical characteristics becomes the second phase input, namely design planning. In the second phase four suitable service design alternatives were made. Of the four design alternatives, a third service design is obtained which is the choice with a value of 4.74 from scale 6. This shows that the third alternative service should be implemented as an effort to improve quality in meeting passenger satisfaction of PO XYZ.
Prosthesis Mapping and Forecasting as a Direction of Innovation in Prosthesis Product Development Isnaini Nurisusilawati; Muhammad Yusro
OPSI Vol 14, No 1 (2021): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v14i1.4579

Abstract

The objective of this study is to make a need assessment in the form of identifying trends in the need for prostheses and mapping the priority types of prostheses developed at Dr. R. Soeharso Orthopedic Public Hospital, Surakarta as a reference for innovation in the development of prosthesis products at Dr. R. Soeharso Orthopedic Public Hospital, Surakarta. The method used was descriptive analysis and moving average forecasting of historical data on the use of prostheses. From the results of the descriptive analysis, it was found that the most common types of the prosthesis were under the knee prostheses and the types of prostheses that mostly used imported components were finger prostheses and prostheses that have been developed locally which were lower and upper knee prostheses and also Syme. The results of the prediction of the number of prostheses showed a stable trend and tended to increase slightly with the MAD error rate of 2.375 and MSE of 10.378 and MAPE of 36%. With this accuracy, the results of the forecasting can be used as a reference for the hospital to make supplies of prosthesis components in the next period so that the time for making prostheses can be shortened. Meanwhile, for the development of the direction of innovation, recommendations for the type of prosthesis that is a priority to be developed at Dr. R. Soeharso Orthopedic Public Hospital, Surakarta is an innovation of under-knee and finger prostheses by implementing low-cost product designs.
Penerapan Metode Six Sigma di PT Triangle Motorindo Arfan Bakhtiar; Bintang Rachvadani Dzakwan; Murni Elfrida Br Sipayung; Claudha Alba Pradhana
OPSI Vol 13, No 2 (2020): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v13i2.4066

Abstract

PT. Triangle Motorindo is the sole agent holder of the VIAR Brand as one of the largest manufacturers of three-wheeled motorcycles in Indonesia. This company was founded in 2000 and has grown as one of the largest manufacturers of three-wheeled motorcycles in Indonesia. As one of the largest producers of three-wheeled motorbikes in Indonesia, PT Triangle Motorindo must be able to maintain and continue to improve the quality of their products in order to remain strong in the competition. In the production process, this company needs to reduce the number of defects that often occur in the production process, so that it decides to use the Six Sigma method to overcome these problems. Six Sigma is a statistical concept that measures a process related to defects or damage. Reaching six sigma means that a process generates only 3.4 defects per million chance, in other words, that it is running almost perfectly. The company is in a position where the defect type reaches 3.55 sigma. Therefore, the DMAIC method is used to increase it to 4 sigma. After the improvement stage is carried out, the company is expected to be able to reach the 4 sigma stage
Optimasi Inventori Dengan Pendekatan Deterministik Dinamis Pada Industri Manufaktur Roti Yevita Nursyanti; Karina Shalsabila
OPSI Vol 13, No 2 (2020): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v13i2.3517

Abstract

This research is to optimize the inventory of bakery products by using several approaches to dynamic deterministic methods. Dynamic deterministic methods used in this research are Wagner-Whitin Algorithm, Silver Meal, Least Unit Cost, Economic Part Period, Lot for Lot, Total Cost Least, Period Order Quantity and Part Period Balancing. The best method is the method that produces the lowest total inventory cost. The result of calculating the total inventory cost using the Wagner-Whitin  Algorithm method is Rp. 2,006,592 ,. The SilverMeal method generates a total inventory cost of Rp. 2,043,725.49. The Least Unit Cost method generates a total inventory cost of Rp. 1,894,624.18. The Economic Part Period method produces a total inventory cost of Rp. 1,235,546.41. The Lot for Lot method generates a total inventory cost of Rp. 2,835,000.00. The Least Total Cost method generates a total inventory cost of Rp. 1,894,624.18. The Period Order Quantity method generates a total inventory cost of Rp. 2,750,767.97. The Part Period Balancing method generates a total inventory cost of Rp. 1,894,624. From the results of all methods, the best method that can be made a proposal to UD.Roti Isabela is the Economic Part Period method with a policy of ordering 3 times an order with a total inventory cost of Rp 1,235,546.41.
DMB Machine Reliability Analysis Through Failure Mode Effect Analysis and Reliability Block Annisa Indah Pratiwi; Boyman Sihombing; Muhamad Sayuti; Nugraha Pradana; Dewih Adetia
OPSI Vol 14, No 1 (2021): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v14i1.4745

Abstract

The production process is carried out continuously, it will result in decreased machine capability. When a component on a machine is damaged resulting in the production process being interrupted, the machine's performance depends on the Reliability of the machine or the component. The DMB machine is a sorting machine at PT Etex Building Performance Indonesia, because it is the main machine in the production process and DMB has a high downtime in 2019. Failure Mode effect And Analysis, aims to determine the machine failure factor. Reliability Block Diagram, to determine machine reliability. The results of research with FMEA are Pneumatic with RPN value 60, Decelerator value RPN 64, Accelerator value RPN 56, Hydraulic Table Safety Lock value RPN 48, Roller value RPN 48 Bearing Lifting value RPN 36, Sensor Transfer Dolly value RPN 48, Motor Transfer Template RPN value 36, the Suction Cup is the component that has the lowest RPN value with a value of 30, from the Reliability Block Diagram (RBD) calculation, the DMB machine reliability opportunity value is obtained including 88.42% of the production process for 23 hours, 42.25% of the process for 161 hours of operation. , and decreased by 2.70% when used for 674 hours of operation. Recommended action is to perform maintenance actions with the type of daily care and weekly maintenance.
The Forty-year History of Revenue Management: Bibliometric Analysis Yun Prihantina Mulyani
OPSI Vol 14, No 1 (2021): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v14i1.4677

Abstract

This paper presents research trends, leading publishers, influential articles, and shifting concerns in the field of Revenue Management for over forty years based on bibliometric analysis. Bibliometric data was retrieved from Web of Science core collection with a well-defined strategy. The data was processed using Network Analysis Interface for Literature Studies Project scripts. Subject-wise and year-wise research trends were presented. The shifting concerns in RM in terms of topic, method, and domain were highlighted using keyword analysis. In general, RM showed an increasing number of published papers with exponential manner every year. The research core in RM covered the three major decisions in RM including pricing, quantity control, and structural decision. It was highlighted that RM’s concern has shifted from single-firm decision to be more consumer- and competition-centric. The data showed that the needs of empirical study and more advanced quantitative methods for complex and real-time problems were urged. In addition, the adoption of RM was extended for industries with semi-flexible capacity. The top influential publishers were Decision Sciences, Operations Research, Management Science, and Management Science Manufacturing & Service Operations Management.
Evaluasi Persediaan Bahan Baku Dengan Menggunakan Pendekatan Metode Continuous Review System Dan Periodic Review System Annisa Indah Pratiwi; Amelia Nur Fariza; Ramdani Awaludin Yusup
OPSI Vol 13, No 2 (2020): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v13i2.4137

Abstract

Planning and controlling the raw material inventory is carried out in such a way as to meet the needs of raw materials appropriately and at low cost. The problem with plate raw materials is that there is no appropriate method of controlling raw material supplies. Control of raw materials at this company is sometimes erratic due to unstable market demand. Experiencing an accumulation of raw materials when product demand decreases and there is a shortage of raw materials when product demand increases. This study aims to determine a probabilistic inventory model that is good for determining the order quantity, ordering time and safety stock by considering the minimum total cost. Based on the analysis and calculation results, the total inventory cost according to company policy is Rp. 14,734,832 / year, the total cost of the Q model is Rp. 16,300,517 / year with q value of 1,484, r is 965, ss 104, α of 0.013 and S of 2.449 and the total cost of inventory in the P model is Rp.6,384,473 / year with a T value of 0.019, R of 2.264, ss of 105 and α of 0.013. The results show that the Periodic Review System inventory model has an optimal total cost of inventory. Keywords: Inventory Control; Continuous Review System; Periodic Review System; Probabilistic.
Analisis Penjadwalan Produksi Dengan Metode Campbell Dudek Smith (CDS), PT. ISM TBK. Divisi Bogasari Flour Mills Jakarta Purwati Purwati; Santika Sari
OPSI Vol 13, No 2 (2020): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v13i2.3674

Abstract

Bogasari is one of the largest wheat flour companies in Indonesia, besides wheat flour also produces a byproduct namely pasta, pellet, and livestock food. As a large company that produces many products need to do production scheduling so that the production time and product quantity produced reach the maximum. To avoid the extension of the production completion time that can ultimately lower the production quantity, one of the strategies that the company can do is by scheduling and allocating the company's resources. The selection of the right scheduling method needs to be done so that the company can have a decision in production scheduling that results in a minimum production completion time and the demand can be fulfilled on time. The methods used are CDS (Campbell Dudek Smith), SPT (Shortest Processing Time), LPT (Longest Processing Time), EDD (Earliest Due Date), and FCFS (First Come First Served). From the results of the research conducted the best scheduling method is the CDS with a makespan of 2,576,807.5 minutes and a flowtime of 21,665,932 minutes

Page 8 of 26 | Total Record : 255

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