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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.
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Articles 255 Documents
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Simulation of Queue System of Retirement Fund Retrieval at The Sanggau Post Office During the Covid-19 Pandemic Using Arena Software Yulianti Wulandari; Tri Wahyudi; Ratih Rahmahwati; Silvia Uslianti; Febri Prima
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.v14i1.4776

Abstract

PT. Pos Indonesia (Persero) entered into a collaboration with PT. Taspen (Persero) in the payment of pension funds. The Sanggau Post Office is a place of public service, where during the Covid-19 pandemic there were still many people queuing to collect pension funds. The number of customers who took pension funds was 208 customers, so there was a long queue which resulted in the crowds of customers queuing up. The application of physical distancing as an effort to prevent the spread of Covid-19 by implementing health protocols while queuing. According to WHO, the physical distancing distance is one to two meters. The need to reduce the queues that occurred during the Covid-19 pandemic can be designed a queuing system model in accordance with existing conditions and an alternative proposed improvement for the optimal queuing system using a simulation method with the help of Arena software. The results showed that the average total time was 10.9 minutes and the average waiting time was 33.9 minutes. Based on the results of the repair scenario, the best scenario for improvement is scenario 2, in the form of a proposed improvement for the addition of 2 counters. Scenario 2 obtains an average total time of 4.9 minutes, while the average waiting time is 5.04 minutes. Therefore, the Sanggau Post Office can add 2 service counters, so there are 3 counters that can serve customers taking pension funds. 
Application of the Poka Yoke Method in the Mix Packing Part Process to Control the Amount of Flow Out Much Djunaidi; Nadari Octaviani Pahlevi
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.v14i1.4476

Abstract

One of the activities of the Karawang ADM Engine Plant in component export is to mix part packing, which is the process of combining several component parts with a certain quantity box into one pallet. This is done to streamline delivery to the destination country. This research was conducted to analyze problems and make improvements in order to achieve the target of zero flow out with the Poké Yoke approach, to design processes or tools so that errors do not occur or at least can be detected or corrected. The flow out occurs when the clip hose part separates from the module and the part way brake actuator is left in the consumable area. Identify the problem using why analysis and the main factors that cause the flow out of man, methods, and environment factors. Some improvement ideas based on Poké Yoke ideas are presented at the end.
Shoe Box Product Development Design Based on Consumer Preference Rossi Septy Wahyuni; Eko Nursubiyantoro; Kristiyani Dwi Agustin
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.v14i1.4500

Abstract

Climate change which is triggered by a consumptive human culture continues to be a concern for many parties to be tackled. Shoes have become the primary need of urban communities because of their function that cannot be separated from their daily activities. Shoes that are purchased by consumers are usually packaged in cardboard boxes that follow the components of the contents, namely the shoes and accessories inside. In this case, shoeboxes with the right design and function according to consumer preferences will reduce the likelihood that the shoeboxes are thrown into the trash. Although it is not the centre of consumer attention, shoe boxes remain a necessity in the final production process. It is necessary to design and develop a shoebox product that is in accordance with the final function of the shoebox according to consumer interests. This study uses the QFD method which produces quality 1 houses with communication tools in the form of a preliminary questionnaire to 30 respondents and a follow-up questionnaire to 100 respondents. Concept selection was carried out on the eight alternative concepts developed. The shoebox concept chosen to take into account the desires of the consumer will be made with a sporty shoebox standard size of 22.5 x 12.3 x 32.5 cm. The environmentally friendly shoebox can be seen through the installation of plastic straps which are expected to reduce the use of single-use plastics. In addition, the shoebox is made with an innovative design so that users can use it repeatedly as shoe storage or multipurpose box.
Pendekatan House Of Risk Untuk Penilaian Risiko Alur Penyediaan Dan Pendistribusian Obat (Studi Kasus Pada Apotek ABC) Guntur Samodro
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.v13i2.3970

Abstract

Pharmacy "ABC" is a trading business in Gunungkidul Regency, D.I. Yogyakarta which is engaged in the pharmaceutical and medical devices. In order to improve the performance of Pharmacy "ABC" in serving and meeting customer needs, it is necessary to identify risks and also mitigate so that supply chain risk management can run according to its function. As for the risk assessment in this study using the House of Risk (HOR). From the research which was conducted at Pharmacy "ABC", there were 17 risk events and 13 risk agents. Based on House of Risk 2 calculations, a risk management strategy will be obtained that is easy to do and can help mitigate the supply chain risk management (SCRM) process at Pharmacy "ABC". Risk management strategies that can be implemented in Pharmacy "ABC" are sharing and updating information with Distributors, building an intensive communication system via Whatsapp, making agreements with distributors regarding the timing of drug delivery to pharmacies, forecasting demand based on historical data and finally sharing and medical education to customers.
Analysis of Cost of Production for Potato Pastel (Case Study: Home Industry, Palembang) Ervina Novita
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.v14i1.4787

Abstract

The home industry is a business that is managed on a small scale. The home industry is a business that is flexible and can be run by anyone who has the ability to manage their own business. One of the home industries located in the city of Palembang is the home industry. This home industry only employs 4-7 employees in its business to produce 250 pastels. In terms of financial management, this home industry does not have special bookkeeping to calculate the business it is running, so that this home industry does not clearly know the costs and benefits of this home industry. Engineering economics is a science that is studied in studying industrial engineering. Engineering economics can be used to analyze the costs and benefits of solving a problem. Technical economics can be used to evaluate finances during the home industry business process. Profits and costs are closely related to the cost of goods manufactured and the break-even point in production.
Application of Ecological Architecture Concepts to Industrial Villages in Surabaya (Case Study: Gundih Village) Dian Pramita Eka Laksmiyanti; Esty Poedjioetami
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.v14i1.3958

Abstract

Global warming encourage people to care more about energy consumption. Metropolitan city like Surabaya has a complex problem in it such as high density, fast growth and development, high energy consumption, and many more. Ecological city supposed to encourage smart citizen, environmentally friendly and humane. It obviously not easy, requires good cooperation between the government, sector managers and the community. The Surabaya mayor's approach and the socialization of the importance of implementing green architecture in each area have succeeded in raising public awareness to create a harmonious, ecological and energy-conscious environment. Apart from the ecological aspects, what makes Surabaya the most advanced city in Indonesia is economic growth. The fast economic growth cannot be separated from the motivation of the Mayor of Surabaya in growing small and medium industries. Kampung Gundih is one of the kampong that has successfully implemented the ecological concept and has become the most advanced home industry in Surabaya by winning the Surabaya Green and Clean in recent years. This study aims to identify and describe the application of Green architecture and ecological concepts in small industrial-based settlements in Kampung Gundih, Surabaya. The method used in this research is descriptive qualitative. The results obtained are a review of the implementation of the concept of ecological architecture in rural areas and small industries, a description of the integrated water management process, and environmental management strategies in Kampung Gundih Surabaya. 
Fuzzy AHP – DEMATEL Methods To Investigate Passengers’ Decision Factors On Using Public City Bus In An Indonesian Region V. Reza Bayu Kurniawan; Trisna Yulianti; Fransiska Hernina Puspitasari
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.v14i1.4478

Abstract

An advanced public transportation system becomes an indicator for a country. Accordingly, it is essential that the decision-makers (DMs) conduct an initial study based on passengers’ view in order to improve the public transportation services. Since involving multi factors, the problem is often solved using the multi-criteria decision-making (MCDM) approaches. This study aims to examine significant factors on passengers decision making to use public transportation using Fuzzy AHP and DEMATEL. The Fuzzy AHP method is proposed to determine criteria weights so that significant critera are obtained, then the causal relations including the criteria are visualized using DEMATEL. This study demonstrates the integration of the two MCDM methods in a BRT system in the region of Yogyakarta, Indonesia, and invites passengers and the DMs. The result indicated that 21 criteria are identified, while the 11 significant criteria are selected based on the Fuzzy AHP weight – α-cut screening. Besides, the DEMATEL has succeeded in describing the influence relationship for the criteria, where firstly, the significant criteria are classified into cause and effect group and secondly, the two criteria, namely coverage to strategic points and on time arrival, should be put on the top priority list. This study enables the DMs to solve public transportation problems more effectively. However, the follow-up study should be carried out by including other factors such as economic and sustainability to strengthen the decision-making process.
Manajemen Persediaan dengan Metode ABC, Hierarchical Clustering, dan EOQ Untuk Menentukan Reorder Point Aditya Bagus Wicaksana; M Amin Syukron; Melinska Ayu Febrianti; Qurtubi Qurtubi
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.v13i2.3998

Abstract

PT XYZ is a company that produces various types of laundry machine with variety of capacity. It is important for a company to maintain the quality of production. The large number of different components originated from several suppliers scattered in several locations, require proper planning to avoid lack of parts or excessive of parts stored in the warehouse. The method of Activity Based Costing (ABC) and Hierarchical Clustering are employed to determine products and main components that are prioritized, as well as to perform reorder point calculation for product’s main components. The result of research identifies five raw materials that should be prioritized and considered, which are Old Version Rad Radiator, As VCN D 50 mm (Length of 60 cm) Black PlatEser MS 1 mm, Motor 1 HP 3 Phase 4 pole B3 Toshiba, and Steam trap S31N Miyawaki 1.6 MPA 220 Degree 15 mm ½”. Reorder point for old radiator could be carried out on the 4th day with safety stock of 2 units. Maximum storage is determined for 6 units with EOQ of 4 units.
Inventory Control Analysis of Plastic Raw Materials Using Monte Carlo Simulation Approach Lusi Mei Cahya Wulandari; Laurensia Dilawati Indrianto Putri
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.v14i1.4744

Abstract

Excess inventory of goods is one factor in increasing production costs and can reduce the profits earned by the company. The company's ability to control the supply of raw materials is the key to the continuity of the production process. This study aims to determine an inventory method that minimizes the cost of supplies of plastic pellets using the Economic Order Quantity (EOQ), Economic Order Interval (EOI), and Min-Max methods. A Monte Carlo simulation approach with Perpetual Simulation, Periodic Simulation, and Min-Max Simulation can use determine the appropriate inventory method in the future. Based on current demand, the EOQ method produces the lowest total cost of inventory. Meanwhile, through a simulation by predicting demand in the next 34 months, the EOQ method also affords the lowest total cost of inventory.
Determination of Optimal Process Parameters In The Process Of Making Ceramics To Maximize Flexural Strength Using the Taguchi Method (Case Study at the Kasongan Ceramics UKM Center, Bantul, DIY) Sutrisno Sutrisno Sutrisno; Dyah Rachmawati Lucitasari
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.v14i1.4498

Abstract

Kasongan Ceramic UKM Center is an association of UKM which makes goods made from clay. Kasongan Ceramic UKM Center, located in Bantul Regency, DIY. The problem that is often experienced by Kasongan Ceramics Center is that products that are often cracked, warped, and easily brittle. The total production of Kasongan UKM Center from September 2019 to February 2020 was 32,256 units, with the number of defective products amounting to 3,873 or 12% of the total production. Based on the studies that have been done, it can be concluded that the defects of cracks, curling, and brittleness that occur are one of them caused by the less than optimal flexural strength of the ceramic products produced. To maximize the flexural strength of the ceramic products produced, the optimal ceramic manufacturing process parameters will be determined using the Taguchi method. To maximize the flexural strength in the process of making ceramics using the Taguchi method, it is necessary to do an experimental design. The first thing to do is to determine the controlled factors and levels in the ceramic manufacturing process that affect the flexural strength. After that determine a suitable orthogonal array and perform experiments based on the specified orthogonal array. The experimental results will be tested for its flexural strength in the laboratory. The resulting flexural strength data will be processed to determine the optimal ceramic manufacturing process parameters that maximize the bending strength of ceramics. Based on the data processing carried out, it is found that the optimal ceramic-making process parameters at the Kasongan Ceramics UKM Center that maximize flexural strength are the composition of 3 parts Godean clay, 3 parts Kasongan clay composition, 1 part sand composition, and burning using an open tub. 

Page 9 of 26 | Total Record : 255

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