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Jurnal Optimasi Sistem Industri

JOSI
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Published by Universitas Andalas

ISSN : 20884842 EISSN : 24428795 DOI : -

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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Pengukuran Risiko Kerja dan Lingkungan Fisik pada Departemen IT dengan Menggunakan Metode Rapid Office Strain Assessment (ROSA) Dian Palupi Restuputri; Diana Puspita; Ahmad Mubin
Jurnal Optimasi Sistem Industri Vol. 18 No. 2 (2019): Published October 2019
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

The use of computers in PT X, especially in the IT department (Information and Technology) has reached 98% of work activities. In the results of the questionnaire using the Nordic Body Map and interviews with employees, it is known that employees experience back pain by 100%, neck 90%, waist 80%, and eye disorders caused by the physical environment. This study used the Rapid Office Strain Assessment (ROSA) method as a measurement tool. ROSA is a quick analysis to measure work risks associated with computer use and determine the level of change in cases of worker discomfort. The measurement results show the final ROSA score is above 7. This means that IT work facilities are not in accordance with the standards of ergonomics, ROSA, and the Ministry of Health No. 48 of 2016 which is a very risky condition and can reduce work productivity. Proposed improvements to minimize workplace risks and increase productivity include improvements to working facilities such as chairs, document holders and tables, location and position of facilities, improvement of the physical work environment such as temperatures to 18 °C, lighting 350 lux, bright color walls of the room and improving employee work postures.

Simulasi Pelayanan Kasir Swalayan Citra Di Bandar Buat, Padang Dewi Rahmadani; Fitri Julasmasari
Jurnal Optimasi Sistem Industri Vol. 9 No. 1 (2010): Published in April 2010
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Antrian merupakan salah satu fenomena yang terjadi dalam aktifitas sehari-hari dialami oleh pelanggan. Akibat dari antrian ini banyak pelanggan beralih ke tempat lain untuk menghindari suatu antrian dan untuk mendapatkan pelayanan yang lebih maksimal walaupun harus mengeluarkan biaya yang lebih besar. Citra swalayan merupakan suatu usaha yang begerak dibidang jasa yang menyediakan kebutuhan manusia sehari-hari. Masalah yang terjadi pada citra swalayan adalah banyaknya antrian pada kasir saat konsumen akan membayarkan belanjaannya. Penelitian ini bertujuan untuk meminimasi lama waktu antrian pada kasir dan memaksimalkan jumlah pelanggan yang selesai dilayani di Citra Swalayan. Data yang diambil atau digunakan yaitu data waktu pelanggan yang datang ke sistem, waktu mulai pelayanan, dan waktu selesai pelayanan. Untuk memperbaiki sistem perbaikan pada Citra Swalayan perlu yang dilakukan yaitu dengan melakukan skenario penambahan server. Berdasarkan dari skenario usulan dari hasil arena bahwa didapatkan nilai antrian terkecil dengan penambahan dua server, sehingga terdapat empat kasir di citra swalayan

Model Hubungan Antar Pemangku Kepentingan dalam Koordinasi Penanganan Bencana di Kota Padang Dicky Fatrias; Ringga Sri Rahayu Agustia
Jurnal Optimasi Sistem Industri Vol. 18 No. 1 (2019): Published April 2019
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Padang, capital of West Sumatera, is one of a disaster-prone area in Indonesia which was impacted the most by 2009 earthquake disaster. After seven years passed, The Regional disaster management agency of West Sumatra stated that the coordination between relevant government agencies in disaster management was still lacking. Associated with such issue, this research proposes to model an appropriate stakeholder’s coordination scheme based on the concept of 3PR (public, private, and people relationship). After all candidates of stakeholder are considered, a successful indicators of disaster response are identified. Using fuzzy AHP, the indicators were weighted based on their relative importance, and the traffic light system was applied to screen the weighted indicators. Finally, the role of each stakeholder was then identified and charted using the interpretive structural model (ISM). The proposed relationship model in disaster management coordination in Padang City consists of two levels. The first level consists of five stakeholders, namely Semen Padang, Insurance, Muhammadiyah, LPP TVRI, and Andalas University. The second level consists of three stakeholders, namely BPBD Kota Padang, Padang City Social Service and Padang City Health Office. Based on the above mapping, public sectors hold the biggest responsibility in the coordination of disaster management while the private sector and people as a supporter in the success of disaster management activities in the city of Padang

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

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.

Analisis Performansi Mesin Pre-Turning dengan Metode Overall Equipment Effectiveness pada PT APCB Nofriani Fajrah; Noviardi Noviardi
Jurnal Optimasi Sistem Industri Vol. 17 No. 2 (2018): Published in October 2018
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

PT APCB is an electronics company that produces electronic device components called Narrow Shaft. The purpose of this study is to evaluate the maintenance activity in a pre-turning machine by measuring the Overall Equipment Effectiveness (OEE) level. The OEE level is obtained based on the Availability, Performance, and Quality Rate of the pre-turning machine maintenance activities. In addition, the purpose of this study is to identify the causes of the ineffectiveness of pre-turning machine maintenance activities and provide improvement suggestions for maintenance effectiveness at PT APCB. Based on the results of the calculation of the OEE value it is known that the PT APCB company still has not reached the world standard of 85%. This shows that the company still has to improve maintenance activities in the pre-turning process. The calculation of OEE value shows that the lowest OEE level in February 2016 was 48.31%, while the highest OEE level in September 2016 was 83.23%. The low performance of the pre-turning machine process was due to the ineffectiveness of maintenance activities which were caused by 14 factors. The primary causal factor with the highest value is the bar feeder problem with the highest request frequency value of 250.

Perancangan Model Pengukuran Kinerja Rantai Pasok Berbasis Lean dan Green menggunakan Balance Scorecard di PT. P&P Lembah Karet Alizar Hasan; Berry Yuliandra; Eureka Perdana Putra
Jurnal Optimasi Sistem Industri Vol. 15 No. 1 (2016): Published in March 2016
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Rapid technological developments helped bring an increase in the level of business competition. Competitive business strategies required to address the challenges of business competition. PT P&P Lembah Karet is a company engaged in the plantation and crumb rubber processing industry. Marketing area is scattered inside and outside the country led to the supply chain performance become one of the important issues in the company. The use of Lean and Green concept in the supply chain system can become a competitive advantage for PT. P&P Lembah Karet to create a more effective and efficient supply chain strategy in terms of expenditure and environmental impact. Performance measurement is required to determine the effectiveness and efficiency of these two concepts implementation in the supply chain companies. Performance measurement system was developed based on four perspectives of the Balanced Scorecard (BSC): financial, customer, internal business processes, learning and growth. Key Performance Indicator (KPI) which is used as a measurement basis is formulated through the concept of lean and green. The weight value of each KPI is determined using Analytical Hierarchy Process (AHP) with relevant experts as respondents. Respondents selected based on the experience and knowledge, especially experience and knowledge that relevant with the topic of this research. The weight value determined the order of KPI priority. Face validity is used to validate the performance measurement model. Data processing and analysis yielded 25 lean and green-based KPIs that are relevant to crumb rubber supply chain at PT. P&P Lembah Karet with 3 KPI for financial perspective, 4 KPI for customer perspective, 11 KPI for internal business process perspective and 7 KPI for learning and growth perspective. The structure of designed models showed that customer perspective is the most priority aspects.

Evaluasi Shift Kerja dan Penentuan Waktu Standar PT X Berdasarkan Beban Kerja Trisna Mesra; Lusi Susanti; Hilma Raimona Zadry
Jurnal Optimasi Sistem Industri Vol. 15 No. 1 (2016): Published in March 2016
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

PT. X is one of the companies located in Dumai Industrial Region, produces fertilizer. This company has three production plants. The production capacity of the first plant is 450 tons/day, the second plant produces 750 tons/day and the third plant produces 700 tons/day. PT. X is supported by 2 sub companies, they are PT. A and PT. B. PT. A operates 5 bagging lines and PT. B operates 3 bagging lines. The fertilizer bagging process has three steps where each step has its own work station: putting the labeled sack to the hook followed by filling the sack with fertilizer, installing the tie cable, and sewing the fertilizer filled sack. From the initial survey, it was found that the processing time is not optimal to reach production target. PT. A and B have to set 24 working hours per day to run the target resulting on frequent over time, excessive fatigue and the negative impact of physically and mentally for the workers. Author’s hypothesis is the current condition has been one of the reasons for a decline of the production output. Therefore, the purposes of the research are to find the impact of current working hours and shift work pattern on the physical and psychological response of the workers and to calculate the standard time required to complete one cycle of bagging process. This standard time is very crucial to determine production target thus determine the optimal working hours and shift rotation. Measuring of heart rate are collecting results of a questionnaire of NASA-TLX are the parameters used to evaluate the physical and psychological response of workers. Two workers from different group worker, different shift work, from PT. A and PT. B were selected as samples to evaluate their heart rate pattern. The questioner spread out to all workers. Time standard was determined by observing and taking data of 40 bagging cycles for each shift work. The results show that shift work affecting the physiological response of workers in PT. B in the category between moderate to extreme especially for working element of arranging fertilizer sack to the pallet. This result was found for the two group workers. Frequent short rests between times are required to provide quick recovery for the workers and reduce excessive fatigue. Average standard time complete one bagging cycle was 0.12 minutes and 0.13 minutes for PT. A and PT. B, respectively. These standard times can be used to set the production output target for the two companies. Last, short rotation shift work with an additional number of workers is recommended for the shift pattern

Pengaruh Shift Kerja, Terapi Musik, dan Motivasi terhadap Beban Kerja Karyawan PT. TOA-GALVA Industries Widiyarini Widiyarini
Jurnal Optimasi Sistem Industri Vol. 17 No. 2 (2018): Published in October 2018
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

TOA Corporation has a factory in Indonesia with name PT TOA Galva Industries producing technology of communication device. This research aims to make improvement towards the workload of the employees in the production of injection plastic part. Problems that arise due to the mental workload of employees affect concentration, performance, achievements, and motivation at work, quality of sleep at home, health, and work accident. This caused by the target measurement and checking of the products of the company are set, the deadline the measurement and checking of products, Division of working time/shift work, irregular work environment factors (noise, temperature, lighting, etc.), and the personal problems brought on when working. Using NASA-TLX (Task Load Index) can be measured the mental workload employees through the phase weighting and rating stage. Early research result obtained values of WWL (weighted workload) of morning shift employees is 76,78, afternoon shift 77,97 and night shift 80,0 results experienced high mental workload. Proposed improvements were made with improved shift work, the application of music therapy and motivation. The evaluation result of the implementation of the improvement suggests the value of WWL (weighted workload) of morning shift employee is 53,34, afternoon shift 54,43, night shift 55,45 result decrease mental workload.

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

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.

Pengembangan Aplikasi @Webplan untuk Perhitungan Waktu Standar pada Proses Perakitan Manual Agus Sutanto
Jurnal Optimasi Sistem Industri Vol. 9 No. 1 (2010): Published in April 2010
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Karya tulis ini berkenaan dengan pengembangan perangkat lunak berbasiskan Web untuk perhitungan waktu kerja standar yang merupakan sebuah modul tambahan pada aplikasi perangkat lunak untuk perancangan sistem kerja berbasiskan Web atau yang diberi nama @WebPlan® yang sudah dikembangkan oleh penulis. @WebPlan ini merupakan integrasi dari beberapa modul untuk perancangan tataletak dan disain stasiun kerja secara virtual 3D. Beberapa modul sudah dirancang sebelumnya yaitu modul untuk visualisasi produk dan strukturnya sehingga dimungkinkan visualisasi yang interaktif untuk proses perakitannya. Sedangkan modul utama dalam @WebPlan ini adalah 3D Facilities Layout dan disain/layout stasiun kerja. Untuk tujuan ini juga sudah dibuat beberapa alat bantu yaitu model manusia 3D untuk beberapa persentil dan beberapa analisa dan checklist ergonomi. Pengembangan aplikasi @WebPlan ini untuk perhitungan waktu standar pada produksi serial merupakan suatu yang sangat diperlukan untuk menentukan waktu total yang diperlukan dalam memproduksi/merakit sebuah produk. Waktu total ini merupakan data penting dalam membuat konfigurasi stasiun kerja untuk pembuatan produk. Metoda Pengukuran waktu perakitan yang dipakai dalam hal ini adalah MTM-UAS (Universal Analysing System) yang sangat cocok untuk perakitan manual. Hasil perhitungan waktu proses perakitan ini divalidasi dengan proses perakitan yang sebenarnya dan tidak menunjukkan perbedaan harga yang cukup signifikan. Beberapa kemudahan yang didapat pada metoda ini adalah MTM-UAS menggabungkan beberapa gerakan dan tidak terlalu detail dibandingkan metoda pengukuran waktu lainnya. Akan tetapi memiliki hasil yang cukup mendekati hasil yang sebenarnya. Modul aplikasi perhitungan waktu standar ini merupakan bagian yang diintergrasikan nantinya dalam perancangan tataletak dan stasiun kerja secara virtual 3D

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Rika Ampuh Hadiguna

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Home Page

OAI Link

Editorial Team

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Contact Name Rika Ampuh Hadiguna

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Location Kota padang, Sumatera barat INDONESIA

Abstract

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Contact Name
Rika Ampuh Hadiguna

Contact Email
hadiguna@ft.unand.ac.id

Phone
-

Journal Mail Official
hadiguna@ft.unand.ac.id

Editorial Address
-

Location
Kota padang,

Sumatera barat

INDONESIA