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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 17 Documents
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Search results for , issue "Vol. 15 No. 2 (2016): Published in November 2016" : 17 Documents clear
Pendekatan Simulasi untuk Analisis Antrian pada Bengkel Servis PT. X Prima Denny Sentia; Ilyas Ilyas; Riyan Haikal
Jurnal Optimasi Sistem Industri Vol. 15 No. 2 (2016): Published in November 2016
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1787.175 KB) | DOI: 10.25077/josi.v15.n2.p105-113.2016

Abstract

PT. X is an authorized dealer and service provider of a reputable car product that provides sales and maintenance services. Total number of counters and stalls owned by PT. X cannot be considered optimal based on the number of cars that will be serviced. Long queues cause customers postponinge the maintenance service and reschedule them to another day. The purpose of this study is to analyze the queue characteristic of the simulation results in the service counters and to design improvement of the scenarios. The study was conducted to implement a simulation model on a service system in order to determine an optimal number of service stations which is appropriate with the waiting time that has been targeted by the company. The analysis of the scenario carried out refers to the target that needs to be achieved by the company that is 15 minutes waiting time to call by counter and 120 minutes waiting time to service. Based on the possibilities occurred, there are 11 proposed improvement scenarios that can be applied in the company. The results from the analysis stated that scenario No. 8 that add two counters and two maintanance stalls in the service station has average waiting time which closed with targeted time set by the company. Therefore, scenario No. 8 is chosen as a proposed improvement actiion. By implementing this scenario it is expected that average waiting time to call by a counter is only on 16,845 minutes on Thursday and the average waiting time to service is only 124,63 minutes on Wednesday.
Usulan Aplikasi Metode Material Requirement Planning (MRP) dalam Perencanaan Kebutuhan Firebrick PT Semen Padang Fajar Aristiyanto; Nilda Tri Putri; Alexie Herryandie Bronto Adi
Jurnal Optimasi Sistem Industri Vol. 15 No. 2 (2016): Published in November 2016
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1127.146 KB) | DOI: 10.25077/josi.v15.n2.p217-226.2016

Abstract

The purpose of this article is to describe the results of research models firebrick requirements planning in PT Semen Padang with MRP method. Firebrick is one of the spare parts and essential in the production of operational PT Semen Padang as protective and insulating of shell kiln. This article describes the firebrick requirements planning at all kiln Indarung II / III, IV and V to meet the needs of 2017 up to 2018. One type of firebrick most widely used in PT Semen Padang is spinal firebrick. Spinal firebrick highly susceptible to hydration and moisture as the main component is MgO compound that is hygroscopic so susceptible to damage in the form of cracks firebrick. Based on the research that has been done, get MRP application design that can be used in planning the needs of firebrick PT Semen Padang to come. Plans need firebrick for compliance in 2017 to 2018 : (a) item 422 purchased through two phases in the 4th month of 12.711 pcs and in the 9th month of 24.909 pcs (b) item 622 purchased through two phases in the 4th month of 21.185 pcs and in the 9th month of 41.515 pcs (c) item P22 purchased through two phases in the 4th month of 446 pcs and in the 9th month of 874 pcs (d) item P + 22 purchased through two phases in the 4th month of 446 pcs and in the 9th month of 874 pcs (e) item 425 purchased in the 8th month of 14.626 pcs (f) item 825 purchased in the 8th month of 20.600 pcs (g) P25 item purchased in the 8th month of 412 pcs (h) P + 25 items purchased in the 8th month of 412 pcs.
Analisis Penggunaan Alat dan Teknik Pengendalian Mutu dalam Penerapan Sistem Manajemen Mutu pada Perusahaan Karet Bersertifikat ISO 9001:2008 Nofriani Fajrah; Nilda Tri Putri
Jurnal Optimasi Sistem Industri Vol. 15 No. 2 (2016): Published in November 2016
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.v15.n2.p203-216.2016

Abstract

The increasing competition in the global market and high consumer expectations for quality products, encourage companies to be able to produce quality products which meets international standards. One of the activities in improving quality that conform to product specifications is applying appropriate quality control system involving all aspects of the company that are integrated with the standard ISO 9001: 2008 as a guide. However, the rubber industry in West Sumatra still faces obstacles in the implementation of quality control techniques and tools of as experienced by ABC and XYZ. This study aimed to evaluate the application of quality control tools and techniques in the manufacturing company which is certified ISO 9001: 2008, ABC and XYZ. This research was conducted by calculating the value of DPMO (Defect Per Million Opportunities). Based on the results found that the two companies have different DPMO value. PT ABC obtained by 5,2σ sigma level from DPMO value of 94.33 for the types of defects whitespot and sigma level of 4,2σ of DPMO value of 3365.096 to defect type of metal, while the XYZ obtain sigma level of 5,3σ from DPMO value of 728.697 for the types of defects whitespot and sigma level of 4,8σ of DPMO value of 425.441 for the type of metal defects. From the analysis it can be concluded that the two companies have not been effective in applying the techniques and tools of quality control in accordance with the standards ISO 9001: 2008 in order to achieve continuous quality improvement. This is indicated by the key success factor of the implementation techniques and tools of quality control is not applied appropriately in achieving continuous quality improvement.
Keandalan Sistem Lintasan Produksi Pembuatan Pipa Taufik Taufik; Wirli Hidayanti
Jurnal Optimasi Sistem Industri Vol. 15 No. 2 (2016): Published in November 2016
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.v15.n2.p143-154.2016

Abstract

Production process of power pole involves connected production process flow between machines. Thus, the company must ensure the machine availability during production runs. PT Kunango Jantan as a company that produces pole power also considers machine availability. The level of machine availability can be seen from the high level of machine reliability. However, the company is still not been able to guarantee the availability of the machine so it is necessary to study the reliability of the system to help to take the right policy in handling pipe production machinery maintenance. The first step is to determine the distribution of machine damage. Minitab 16 software was used determine the type of distribution and distribution parameters of each machine damage. In addition, mean time between failure (MTBF) was calculated to the pipe manufacturing machine. The machine reliability was obtained based on a formula and parameters. The determination of the system reliability was derived from the block diagram in accordance with the condition of machines in the field. The analysis was performed using fishbone diagram to propose an attempt to increase the machine reliability. The results of this study indicate that the machine reliability in good level since the reliability value is between 0.901 to 1.000. The machine reliability in a series circuit is smaller than the machine reliability in a parallel circuit. Rs and R values of the system were 0.980 and 0.998. R system shows that the system has a good performance with a chance of machine damage during production <0.002 (0.2%).
Penyusunan Kriteria Rumah Tinggal Berkonsep Ergo-Ekologi dalam Upaya Peningkatan Kenyamanan Termal Penghuni Lusi Susanti; Sri Zetli
Jurnal Optimasi Sistem Industri Vol. 15 No. 2 (2016): Published in November 2016
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.v15.n2.p155-170.2016

Abstract

Nowadays, developers of residential houses often neglect to pay attention about the air circulation as one of the factors that affects thermal comfort zones inside the room environment. In general, people overcome the thermal discomfort using mechanical ventilation such as a fan or Air Conditioning (AC).This study measured the comfort zone of 32 row houses in the Batam city with two types of floor area (LT ≤ 36 m2 and LT > 36 m2). Other variables include Ceiling Height (Tpi), Aperture Area (Vi), Wall Materials (Bhi) and Orientation (Ori) were also considered in this measurement. The results show that thermal comfort zone was influenced by the wall material (Bh1) made from brick, aperture area (V2) > 20% of the floor area, and ceiling height (Tp2) > 3 m. While the house orientation variable can still be received by utilizing the architecture techniques to reduce direct solar radiation. This study also formulated three models of row house design with ergo-ecological concept, which are Ree = f {Lti, Bh, V, Tp2, Ori} atau Ree = f {Lt2, Bh, V, Tp1, Or2} atau Ree = f {Lt1, Bh, V, Tp1, Or1}.
Aplikasi Algoritma Hybrid dalam Penentuan Rute Pendistribusian Produk (Studi Kasus: PT. Enseval Putera Megatrading) Eri Wirdianto; Dhina Regenie; Wisnel
Jurnal Optimasi Sistem Industri Vol. 15 No. 2 (2016): Published in November 2016
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.v15.n2.p171-180.2016

Abstract

PT. Enseval Putera Megatrading is a company which operates in general business and distribution of pharmacy products, general needs, cosmetics, foods and hospital equipment. In their current practice, routing in products deliveries, which is limited by time windows, has not considered the utilization of vehicles' maximum loading capacities. Distribution route from a hybrid algorithm using heuristic clustering and Mixed-Integer Linear Programming approach can accommodate such problem with time windows and vehicles' capacities utilization. Based on the comparison between company’s current route and the route from the hybrid algorithm, it can be seen that the hybrid algorithm is able to decrease total distance and total cost of transportation. This new route concerns on vehicles allocation and time windows limit. This new route can minimize the total cost of transportation that company has to pay.
Evaluasi Kualitas Layanan Nasabah dengan Metode Kano, Analisis Kuadran dan Triz Studi Kasus: Bank Nagari Cabang Pembantu Universitas Bung Hatta Padang Dewi Oktaviani; Hilma Raimona Zadry
Jurnal Optimasi Sistem Industri Vol. 15 No. 2 (2016): Published in November 2016
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.v15.n2.p181-202.2016

Abstract

The banking industry is one of the pulse of Indonesian economic system. Bank Nagari is an industry aims to support the community’s economic development in West Sumatra. These objectives can be realized if Bank Nagari is able to face the existing challenges and problems. However, based on the preliminary studies, it was found a weakness in the bank services, such as the irreverent attitude of the tellers to the customers and long queues at certain times. Therefore, there is a need for a solution and quick actions so that Bank Nagari can improve customer satisfaction and provide excellent service to the communities. This study was conducted at Bank Nagari branch Bung Hatta University, Padang. Data is collected using questionnaire. The questionnaires were distributed to 97 respondents consisted of 24 variables and analyzed using the Kano method, quadrant analysis, and Theory of Inventive Problem Solving (TRIZ). The study proposed improvements to Bank Nagari branch Bung Hatta University, Padang. It is proposed to install a bulletin board or poster containing bank service procedures and information about bank services, to provide training to the bank employees, to focus on the frequent bank service problems and the evolution of the bank service system from traditional services to phone banking or internet banking.

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