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Jurnal Optimasi Sistem Industri
Published by Universitas Andalas
ISSN : 20884842     EISSN : 24428795     DOI : -
Core Subject : Science, Engineering,
Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Optimasi Sistem Industri (JOSI) is a peer-reviewed journal that is published periodically (April and October) by the Department of Industrial Engineering, Faculty of Engineering, Universitas Andalas, Padang.
Arjuna Subject : -
Articles 394 Documents
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Analisis Perhitungan Biaya Penambangan Batu Silika Pada Departemen Tambang PT Semen Padang Suci Rahmawati SY
Jurnal Optimasi Sistem Industri Vol. 10 No. 1 (2011): Published in April 2011
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v10.n1.p93-104.2011

Abstract

Cement manufacturing is consisting of four components that are limestone with the percent composition of 70%, iron sand 10%, silica 10%, and clay 10%. Source of major raw materials for cement production in PT Semen Padang are limestone and silica. The mining process is involving various costs such as direct costs, indirect costs, overhead costs, etc. Therefore, cost calculations needed to determine the selling price of produced silica. In calculating the cost of production considered various aspects, such as operating costs, material costs, labor costs. So that, it can determine cost of goods production. The research objective is calculating cost of goods manufacturing the silica. Benefit of the research for PT Semen Padang is describing cost of goods production in determining cost of goods sold. Cost of goods production that resulted for silica mining is IDR 58.000 per ton, while internal price of silica is IDR 53.851 per ton. Research result is show that there is difference between results based on Full costing method with current price. This shows that several other factors is necessary considered in calculating the cost of goods production.
Analisis Sistem Rantai Pasok PT. Semen Padang Fitri Julasmasari; Hendra Saputra; Mury Wijaya; Opie Analia; Rahmad Illahi
Jurnal Optimasi Sistem Industri Vol. 10 No. 1 (2011): Published in April 2011
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v10.n1.p113-120.2011

Abstract

Supply Chain Management is a concept or mechanism to increase the total productivity of companiesin the supply chain through optimization of the time, location and quantity of material flow from rawmaterials into semi-finished products and finished products. Supply Chain Management is not onlyabout the relationship with the supplier but also the link between the company and consumers. Tofind out the value of the company supply chain performance within a certain time, we need a draftmodel of supply chain performance measurement in which the design will be implemented at thecompany. By knowing the value of supply kunerja chainnya the company can improve theeffectiveness and productivity of the organization to achieve organizational goals is to win thecompetition, and increase corporate profits.
Sistem Rantai Pasok Industri Minuman Softdrink Yossy Kartika; Rahmi Novana; M. Dzikri; Hardiansyah M. Oktafani; Rio sandra
Jurnal Optimasi Sistem Industri Vol. 10 No. 1 (2011): Published in April 2011
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v10.n1.p121-126.2011

Abstract

This paper discussed the supply chain management solutions at PT Coca Cola Bottling Indonesia withan evaluation of supply chain management of Coca Cola, where supply chain management is aconcept or mechanism to increase the total productivity of companies in the supply chain throughoptimization of the time, location and quantity of flow materials from raw materials into semi-finishedproducts and finished products. Supply Chain Management is not only about the relationship with thesupplier but also the link between the company and consumers. By knowing the value of theperformance of supply chainnya the company can improve the effectiveness and productivity of theorganization to achieve organizational goals is to win the competition, and increase corporate profits.In such measurements should be made an integrated framework and must comply with theconditions of the studied companies.
Analisis Penyimpanan dan Pengeluaran Bahan Curah PT. Semen Padang Suci Rahmawati SY
Jurnal Optimasi Sistem Industri Vol. 10 No. 1 (2011): Published in April 2011
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v10.n1.p127-133.2011

Abstract

Inventory are assets of a company. If the inventory control of a company is not good then the company will incur a loss, if a company's inventory control both the Performance Management will benefit. Inventory control is one of them can be done by looking at inventory turnover (ITO). Since inventory is a very important thing to do design a model that can be used as an alternative to using the approach Economic Production Quantity (EPQ). Inventory control can be done in a way determine the number of requests a year to do the calculations for the current conditions in the ITO. then performed 12 period ahead forecasting using linear, quadratic, exponential, cyclical, and cyclical trends, the Standard Error of Estimate (SEE) the smallest of each method obtained the number of requests made after that period 12 calculations Economic Production Quantity (EPQ ) to get the optimum amount of inventory as well as ITO calculations performed for the optimum amount of inventory.Based on calculations obtained ITO current state of the low of 0.010, while the ITO using EPQ is 0.230. Concluded that the inventory control for coal by using the method of generating EPQ inventory turnover is better than the methods currently used by the company.
Manufaktur Berkelanjutan Pada Sampah Elektronik: Kasus Sampah Kulkas Agus Sutanto; Berry Yuliandra; Willy Pratama
Jurnal Optimasi Sistem Industri Vol. 16 No. 1 (2017): Published in May 2017
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v16.n1.p25-33.2017

Abstract

The growth of the Wastes from Electric and Electronic Equipments (WEEEs) or e-waste is presently considered to be one of the rapid increasing wastes streams in the large city of Indonesia. Concurrently, the urban mining activities for e-waste by informal sectors have potential on the economic, social and environment dimension. The three dimensions form a triple bottom line that supports the principles of sustainability in the manufacturing. In this research, the observation in some remote areas in Padang is conducted to find out the model of e-waste collection system activities from the household and its economic potential, especially for refrigerators e-waste. The result shows that minimaly there are three models of the e-waste collecting system for refrigerator e-wastes. The model involves all the parties in urban mining activities such as e-waste collectorsfrom household, repair shops, collectors who continue the re-assembly and classify the e-waste and final collectors who did the cleaning, crushing, packing and transporting e-waste to another city to do the recycling process. In this e-waste collecting model the components of refrigerator e-waste could be reused, remanufactured and recycled. From the reassembly of therefrigerators it is obtained the material composition of 58.1% iron, 26.3% plastic,10.9% styrofoam 10.9%, 2.1% aluminum, 1.8% copper pipe, and 0.8% others. The highest cumulative retained value is obtained from this collecting system ranged between IDR 230.200 to 355.200, where some second-hand components may still be inreuse and remanufacture. This price is equivalent to 14.9% to 22.1% the purchase price of a new refrigerator.
Pengalokasian Tenaga Kerja dengan Human Factor Engineering di PT. Pelindo I Yusnawati; Abdul Rahim Matondang; Listiani Nurul Huda
Jurnal Optimasi Sistem Industri Vol. 16 No. 1 (2017): Published in May 2017
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v16.n1.p34-39.2017

Abstract

Indonesia Port Corporation I (PT Pelabuhan Indonesia I (Persero)) or PT. Pelindo I is one of the Indonesian state-owned enterprises which manages port services in western Indonesia. Shipyard unit (Unit Galangan Kapal (UGK)) is a branch of PT. Pelindo I. At present, a problem arises if more than 2 ships are being repaired at once in the unit, UGK scheduling overlaps the repairing activities. In order to solve the problem, study of human factor is important. Human factor is the study of the limitations, capabilities, and human behavior, as well as its interaction with the product, environment, equipment and the establishment of tasks and activities. One part of the human factor is the human factor in system design. In order to improve the effectiveness of the system, the human factor must be involved in each phase of the design process in the system design. This includes a number of activities to obtain input specification work, therefore the working methods and the optimal amount of labor can be determined. Human factors engineering is the application of science that utilizes research on the human factor and use the basic knowledge to design, to repair and to install the system. This research method is causal, searching for the causes which led to delays in the completion of ship repairing. Through human factor engineering approach to the allocation of labor increased by 12.23 per cent of the actual conditions, so that the delay of ship repair were not found during normal conditions.
Penjadwalan dan Penentuan Rute Distribusi Komoditas ke Wilayah Timur Indonesia Erika Fatma; Winanda Kartika
Jurnal Optimasi Sistem Industri Vol. 16 No. 1 (2017): Published in May 2017
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v16.n1.p40-49.2017

Abstract

Indonesia’s geographical conditions, particularly in the eastern region, which is archipelago has its own challenges in the distribution of commodities, such as rice. Most of the rice needed in eastern Indonesia, is still supplied from Java Island. The most suitable transportation mode for rice distribution in the eastern region of Indonesia, is by sea (ships). In this study, a ship routing and scheduling model for commodity distribution in the eastern region of Indonesia was developed, using capacitated vehicle routing problem (CVRP) method. The model was built by considering the number of demands on the destination, ship capacity, and ports service time. Modeling was developed to determine distribution route and schedule that can provide total minimum cost and meet all of the restrictions.
Desain Portofolio Optimal untuk Keputusan Investasi pada Fase Krisis Keuangan Deddy Saptomo; Insannul Kamil; Elita Amrina; Mego Plamonia
Jurnal Optimasi Sistem Industri Vol. 16 No. 1 (2017): Published in May 2017
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v16.n1.p68-79.2017

Abstract

This research aims to design optimal portfolio with a case study of stocks listed on the Indonesia Stock Exchange (IDX) that conduct transactions in the period 2011-2015. The sample used were 396 companies listed on nine sectors in BEI. Arbitrage Pricing Theory (APT) method is used to determine the realized return, expected return, and efficient portfolio involving four macroeconomic factors (Stock Price Index (IHSG), interest rate of Indonesian Bank Certificates (SBI), Inflation and Exchange Rate of Rupiah against the US Dollar). Efficient portfolio is formed by 231 undervalued companies. While the optimal portfolio with the Excess Return to Beta (ERB) approach was formed by 42 companies with a ERB value greater than (or equal to) cut-off point (0,1912). Under the uncertainty of the investment climate due to the global financial crisis, the decision to make investments needs to be done carefully and consider various factors, including macroeconomic factors. This research has succeeded in designing an optimal portfolio that can be a guide for investors to determine investment decisions.
Model Kebijakan Penetapan Institusi Masjid sebagai Shelter dalam Sistem Logistik Bencana di Kota Padang Winny Zilkhalida Hadi; Rika Ampuh Hadiguna
Jurnal Optimasi Sistem Industri Vol. 14 No. 1 (2015): Published in April 2015
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v14.n1.p16-32.2015

Abstract

The west coast of Sumatera island is one of potential areas of the earthquake and tsunami that requires high vigilance and preparedness seriously. One is the well-prepared-disaster logistics system. World Health Organization (WHO) has been divided into 10 categories of logistics, including the temporary shelter. The purpose of this study is to study attributes that should be required for the mosque as a shelter for victims of the earthquake and tsunami in Padang and provide recommendations to the government of Padang to prepare the mosque as a shelter. Formulation of mosque attributes as a shelter eligibility has been obtained through literature review and interviews. Attributes have been formulated in the form of questionnaires that filled out by prospective refugees of the earthquake and tsunami in Padang . Result of questionnaire has been used to build the House of Quality (HOQ). Furthermore, a SWOT analysis has been conducted to formulate a strategy for local government in an effort to empower mosques as shelters in Padang.This research has resulted 14 attributes of feasibility mosque as a shelter. Attributes divided into seven categories. Strategies that result based SWOT analysis have nine formulations that consists of two SO strategies, four WO strategies, two ST strategies, and one WT strategies. Implementation of this strategies required responsibility and cooperation between government, community, NGO, and leaders.
MODEL SIMULASI KINERJA PRODUKSI TEH UNTUK MINIMISASI WORK-IN-PROCESS Agus Wibowo; Demi Ramadian
Jurnal Optimasi Sistem Industri Vol. 9 No. 1 (2010): Published in April 2010
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v9.n1.p7-12.2010

Abstract

Simulasi komputer adalah salah satu cara yang digunakan untuk menganalisis suatu sistem dengan cara memodelkannya menggunakan software komputer. Dengan menggunakan simulasi kita dapat melihat secara langsung proses kerja dari sistem. Dalam penelitian ini digunakan software Arena 10. Proses kerja dari software ini yaitu ada input, proses, output dan analisis. Yang menjadi input dalam penelitian ini yaitu waktu dan jumlah kedatangan teh, proses-proses produksi teh, waktu proses dari masing-masing stasiun kerja, resource dari masing-masing mesin yang didapatkan dari wawancara dengan seorang yang sudah lama di perusahaan itu. Prosesnya yaitu merancang modul-modul Arena yang digunakan lalu me-run-nya sebanyak replikasi yang dibutuhkan. Outputnya yaitu berupa data statistik ratarata, standar deviasi dan nilai maksimum serta minimumnya. Sedangkan analisisnya yaitu menggunakan proses analyzer untuk menentukan skenario bagaimana yang cocok untuk mendapatkan WIP yang minimum. Berdasarkan output yang didapatkan, ternyata WIP terlama terjadi pada SK pendinginan, karena pada SK tersebut memiliki rata-rata jumlah menunggu yang terbanyak. Berdasarkan Skenario 1 Rata-rata WIP teh yaitu 28,722, setelah melakukan penambahan kapasitas mesin Pendinginan maka didapatkan jumlah kapasitas terbaik yaitu 9 Bath sekali proses dengan WIP 28,446

Page 38 of 40 | Total Record : 394

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