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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.
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Articles 10 Documents
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Search results for , issue "Vol. 14 No. 1 (2015): Published in April 2015" : 10 Documents clear
Identifikasi Risiko Kesehatan dan Keselamatan Kerja pada Pekerja Pengumpul Sampah Manual di Jakarta Selatan Dino Rimantho
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 | Full PDF (891.713 KB) | DOI: 10.25077/josi.v14.n1.p1-15.2015

Abstract

Waste collection is one of the activities that should be performed on the waste management process. This activity can pose a potentially high risk given the dangers that may arise while direct contact with the garbage and activities conducted. This study aims to identify potential risks to the health and safety of workers garbage collector. The survey uses a structured questionnaire distributed to 25 the refuse collector randomly selected in Srengseng SawahJagakarsa, South Jakarta. Descriptive statistics were used to analyze the data collected. The garbage collectors who agreed on the use of personal protective equipment at work is approximately 64% or around 16 respondents. Musculoskeletal disorders suffered by respondents is around 19 people or roughly 76%. The Respondents who suffered puncture wounds as a result of did not use gloves were 23 respondents or approximately 92%. Wrist and lower back are the most common musculoskeletal disorder that affects approximately 23 respondents. Generally, workers require personal protective equipment in order to prevent and reduce accidents. Improvement measures should be always be done such as healthy behavior, use of personal protective equipment and the development of working methods based on ergonomic principles.
Perancangan Konfigurasi Tinggi Setang, Sadel, dan Pedal Sepeda yang Ergonomis Lusi Susanti; Yogi Hendra Agustion
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.p33-38.2015

Abstract

The bike is still one of the favorite modes of transportation as it is cheaper and environmentally friendly. However, some problems still arise in current bicycle design, one of which is a discrepancy between dimensions of the bike with anthropometry of the user. This has resulted in unneutral and uncomfortable posture for the users. This study focuses on providing optimum configuration of distance from saddle to pedal, the height of handle-bar, and distance from handlebar to saddle of the bike. Some physiological parameters such as the percentage of CVL (cardiovascular limit), energy consumption and Posture Evaluation index are measured to determine the optimum distance of handle-bar, distance from handlebar to saddle, and distance from saddle to pedal. Results show that it is necessary to modify the current dimension of the bike to accommodate three posture categories of Indonesia population: small posture (P5), medium (P50) and large posture (P95).
Usulan Indikator Evaluasi Pemasok dalam Penetapan Bidder List: Studi Kasus Pengadaan Jasa PT. Semen Padang Pri Gustari Akbar; Henmaidi Hadiguna; Elita Amrina
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.p39-54.2015

Abstract

Each company will seek to improve performance in order to obtain the optimal results and customer satisfaction. One of the factors that affect the performance of the company is the supplier or vendor, which acts as a supplier of the operational needs of the company consisting of raw materials and spare parts manufacturing equipment. The existence of suppliers is crucial for the production process and the product to be produced. Therefore, it is necessary to a proper selection of suppliers so as to eliminate all risks that would result in losses for the company. PT. Semen Padang is one of the companies involved in the cement industry is one of the members of PT. Cement Indonesia as the Holding Company. Until now both PT. Semen Padang and PT. Cement Indonesia does not have yet a standard method in the selection of suppliers for the procurement process of goods and services. This study aims to design the proposed indicator in the evaluation of suppliers to determine the bidder's list on a tender for the procurement of services in PT. Semen Padang. Based on the literature study, it obtained six criteria i.e: quality, delivery, performance history, price, technical capability, and procedural compliance, which are divided into 13 indicators of performance evaluation. These indicators will be validated by the cement industry. Future studies will design a model of evaluation of suppliers using Analytic Hierarchy Process (AHP) method to determine the bidder's list on a tender for the procurement of services in PT. Semen Padang.
Analisis Bahaya Fisik: Hubungan Tingkat Pencahayaan dan Keluhan Mata Pekerja pada Area Perkantoran Health, Safety, and Environmental (HSE) PT. Pertamina RU VI Balongan Dina Rahmayanti; Angela Artha
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.p71-98.2015

Abstract

The eyes are part of the body that must be protected workers safety and health. Sufficient light is one of the most important aspects that determine the health of the eye, excellent lighting intensity affects the eyes. This study was performed at PT Pertamina RU VI Balongan, based on observation in the work area, it is necessary to evaluate the intensity of light and eye strain workers in a unit of PT. Pertamina Refinery Unit VI Balongan.Be collected from primary and secondary data and processing in the form of statistical testing using Microsoft Excel and SPSS Software 2.0. Tests conducted on four types of questionnaires and data variables intensity lighting in the office area of HSE unit RU VI Balongan.There are 12 rooms which have the following illumination standard (under 300 lux). Based on a statistical test between the variable quality of the lighting of the eye complaints get results there are two variables that have a relationship. In addition, all respondents had complaints of eye fatigue that varies with the highest percentage of 80% with complaints of eye feel sleepy and 63% of workers feel pain in the neck or shoulder.
Analisis Ketidaksesuaian Produk Air Minum dalam Kemasan di PT Amanah Insanillahia Elita Amrina; Nofriani Fajrah
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.p99-115.2015

Abstract

Nowadays, the development of industry is increasing very rapidly. It can be known as the high competition between companies. Not only large and international scaled companies, small and medium-sized companies are also facing the same challenges in the global competition. Therefore, the companies need to conduct a quality control to maintain the quality of products produced and to achieve the conformance to specifications of product that has standardized by the company policies in order to improve the customer satisfaction. PT Amanah Insanillahia is a company involved in the bottled water industry. Based on the preliminary study, it shown the quality control only conducted to check the number of defective products produced without further evaluation and analysis. Therefore, there is a need to analyze the data of defective products produced and evaluate the results. The purpose of this study is to analyze the nonconformity product of the bottled water 600 ml brand PRIM-A. The p-chart is used in this research to analyze the number of defective products. Then, the fishbone diagram is used to analyze the causes of defective products. The results show that there is no data out of the control limits and mostly the data near in the central line of the p-chart. Using the fishbone diagram, it concluded that factors of man, machines, materials, methods, and environment are the causes of nonconformity products of the bottled water 600 ml brand PRIM-A. It is hoped this study will beneficial for the company to improve the product quality as well as to increase the customer satisfaction.
Perancangan Prototype Early Warning System pada Kontrol On/Off Belt Conveyor Menggunakan PLC Siemens S7-300 Taufik; Wahyuni Putri
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.p116-137.2015

Abstract

Nowadays, automation system become an important aspect of the manufacturing process because could make integration manufacturing process on it more effective and more efficient. PLC or Programmable Logic Controller is one kind of automation system. Many industries use PLC as automation control device in the manufacturing process to control all kind of process. For example at transportation process of coals in generator industry. Coals could be burned because main elements of coals are carbon, hydrogen, and oxygen. Base on this prototype early warning system design, we get the result if sensor thermocouple detects temperature larger than setpoint temperature (it is 2000C), then PLC will give an order to shut down the output, that is a belt conveyor. The result of this prototype design could use at coals transportation as an early warning system. The design of prototype early warning system could detect and prevent fire because of the consequence of burned coals until spreading of fire could be avoided.
Analisis Pengukuran Produktivitas Perusahaan Alsintan CV. Cherry Sarana Agro Prima Fithri; Regina Yulinda Sari
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.p138-155.2015

Abstract

CV Cherry Sarana Agro is a manufacturing company, which produces agricultural machinery. In reality, company evaluatesits work and performance based on level of profits. In order to maintain the company's performance, it is necessary to measures the productivity of company to see how effective the performance of this company. So it can be determined what is needed in order to improve the performance of the company and also can increase profits. Measuring the productivity can be seen from the financial data that obtained from the company. Then based on data processing, show this company's productivity levels decreased during the period of measurement and it means company requires efforts to increase the efficient use of inputs. It is necessary for company to increase its productivity for the future. This improvement was made by taking into account the partial productivity as inputs that affect the profitability of the company on an ongoing basis.
Perancangan Sistem Penunjang Keputusan Investasi Daerah Berbasis Webgis di Provinsi Sumatera Barat (Studi Kasus Badan Koordinasi Penanaman Modal Provinsi Sumatera Barat) Difana Meilani; Ryan Amirulfiras
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.p156-175.2015

Abstract

The implementation of decision support system will be applied to support the regional investment of West Sumatera by providing a feasibility study analysis; exclusively the aspects of economic and financial criteria. This research was carried out in West Sumatera Regional Investment Coordinating Board as the authorities of regional investment licensing and controlling. The first step in designing a decision support system is conducting Pre – Study. It consists of literature study and pre–design study related to the field of study. Next step is using Unified Modeling Language (UML) method to provide, represent and visualize the system. The basic model of the financial feasibility study is implemented by using the predetermined assumption as the scope of the best system performance. The system design which is implemented uses the Web and GIS concept. Otherwise, the expected result from the research is the application is able to calculate the basic data from financial feasibility aspect into needed information in order to analyze the feasibility of any investments. The result should be converted into Net Present Value, Benefit Cost Ratio, Internal Rate of Returns, and Payback Period value. The last step of the research is verification and validation in order to make sure the ability of application accommodating the pre -design system requirements. The result of verification and validation is able to accommodate the pre -designsystem requirements conclusively.
Strategi Perencanaan Jumlah Material Tambahan dalam Memproduksi Semen dengan Pendekatan Taguchi untuk Meminimalkan Biaya Produksi (Study Kasus PT Semen Padang) Nelvi Irawati; Nilda Tri Putri; Alexie Herryandie Bronto Adi
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.p176-191.2015

Abstract

Cement is a construction material with a specific quality that must be meet standard requirements and customer requirements. Through a good and continuous quality control, it will produce cement with consistent quality as its Quality Planning. Cement quality is calculated after adding water by measuring its setting time, compressive strength developing, the heat of hydration, expansion/shrinkage, and its durability to environment effect. In cement application, the primary parameter to determine cement quality is its compressive strength. Some factors that affect compressive strength of cement are reactivity and amount of Tricalcium Silicate (C3S) of Clinker, Clinker free lime (free CaO), amount of SO3 in Cement, the amount of additional materials (insoluble residue/IR and loss on ignition/LOI), and sieve on 45 µm residue of cement. This research is intended to find how insoluble residue/IR, loss on ignition/LOI, and the amount of SO3 will affect compressive strength of cement. Various percentages of IR, LOI, and SO3 in cement will result in different compressive strength. Taguchi Method is applied to determine material proportion. With Orthogonal Array calculation for 3 factors and 4 levels, it will result in 16 calculation running times (L16 4**3). In laboratory scale, cement for this research has been being manufactured and then its compressive strength for 3 days, 7 days, and 28 days will be measured. Determination of optimal proportion will be calculated by statistic method for higher compressive strength and lower manufacturing cost.
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.

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