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Jurnal Teknik Industri
ISSN : 14112485     EISSN : 20877439     DOI : -
Core Subject : Engineering,
Jurnal Teknik Industri aims to: Promote a comprehensive approach to the application of industrial engineering in industries as well as incorporating viewpoints of different disciplines in industrial engineering. Strengthen academic exchange with other institutions. Encourage scientist, practicing engineers, and others to conduct research and other similar activities.
Arjuna Subject : -
Articles 325 Documents
An Exploration of Risks Involved in Managing Supplier Portfolio in Multinational Companies Operating in Indonesia Sepadyati, Nova
Jurnal Teknik Industri Vol. 21 No. 2 (2019): December 2019
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (834.051 KB) | DOI: 10.9744/jti.21.2.79-90

Abstract

Outsourcing applications have widely used and regarded as a primary strategic mana­ge­ment tool by firms. However, particularly in the Fast Moving Consumer Goods (FMCG) indus­try, most companies have at least once declined from a renewing contract with the same service provider. There have not been any studies regarding risk management in a buyer-supplier relation­ship in multinational companies (MNCs) from developed countries operating in an emerging country, particularly in Indonesia. The purpose of this qualitative study is to find out how MNCs in the FMCG sector in Indonesia choose their suppliers, risk perceived, and how they manage their relationship with different suppliers to ensure their performance. Buyer's previous experience, time/cost pressure, and company's culture proved to influence companies in selecting suppliers. Key risks perceived by companies mainly regarding unperformed suppliers, supplier's opportunistic behaviour, and unstable economic/political condition. To ensure a supplier's perfor­mance, companies need to set different relationship positioning for each activity outsourced through a proper type of contract and aligned performance measurement. Moreover, a formal supplier rating has not found in all companies, let alone supplier development initiatives.
DEFECT DETECTION ON TEXTURE USING STATISTICAL APPROACH Halim, Siana
Jurnal Teknik Industri Vol 17, No 2 (2015): DECEMBER 2015
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (456.377 KB) | DOI: 10.9744/jti.17.2.89-96

Abstract

In this paper we present several techniques for detecting simple defect on the texture. The simple defect means, that the defect can be detected via image histogram or via wavelet of the image histogram. Hill estimator is one of the techniques that we suggest to use to solve this problem, since it does not need estimate parameters for estimating the image density
PEMETAAN PENDERITA PNEUMONIA DI SURABAYA DENGAN MENGGUNAKAN GEOSTATISTIK Hartanto, Stefanie; Halim, Siana; Yuliana, Oviliani Yenty
Jurnal Teknik Industri Vol 12, No 1 (2010): JUNE 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (294.777 KB) | DOI: 10.9744/jti.12.1.pp. 41-46

Abstract

In this paper we mapped the location of Pneumonia disease in Surabaya. We also analyse the survival of the afflicted and predict the spread of the disease using Kriging. The study reveals that after 45 days in the hospital, the survival of the Pneumonia?s patients decrease to 46.8%. Moreover, the centers of this disease are in Tubanan and Sukomanunggal Both of these regions are in West Surabaya which also is an industrial part of the city.
PERANCANGAN BERBASIS KOMPUTER UNTUK REKAYASA PRODUK DAN PROSES KOMPLEKS Ferryanto, Liem
Jurnal Teknik Industri Vol 6, No 2 (2004): DECEMBER 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (297.723 KB) | DOI: 10.9744/jti.6.2.pp. 111-120

Abstract

We enhanced DFSS Characterize and Optimize Phases to deal with multiple and functional response optimization. The enhancement basically starts with a development of functional meta-models of CAE outputs that are fast-to-compute and accurate enough within a certain design space. Having developed the multiple and functional meta-models, the influence of design variables to the functional responses are then obtained via visualization and sensitivity analysis based on Sobol's index. Multi-objective optimization is finally applied to search for design variable settings that give optimal functional responses. Abstract in Bahasa Indonesia : Di artikel ini kita memperkaya fase-fase Characterize and Optimize dari design for six sigma (DFSS) methodology untuk bisa menyelesaikan rekayasa produk dan proses kompleks yang mengandung banyak respons fungsional. Pemerkayaan dimulai dengan pembangunan meta-model fungsional dari keluaran computer aided engineering (CAE) yang diperoleh lewat rancangan eksperimental. Kemudian, dilanjutkan dengan pembangunan sebuah algoritma untuk mengidentifikasi tingkat pengaruh dari variabel-variable rancangan ke respons fungsional secara visual maupun analitis. Akhirnya, optimasi multi obyektif diterapkan untuk mencari nilai-nilai variabel design yang mampu memberikan respons fungsional secara optimal dan tangguh. Kata-kunci: perancangan berbasis komputer, response fungsional.
PENGEMBANGAN KURSI RODA SEBAGAI UPAYA PENINGKATAN RUANG GERAK PENDERITA CACAT KAKI Batan, I Made Londen
Jurnal Teknik Industri Vol 8, No 2 (2006): DECEMBER 2006
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2504.929 KB) | DOI: 10.9744/jti.8.2.pp. 97-105

Abstract

According to the survey to the wheelchair users in Surabaya, it is found that 70% of the respondents want to have activities inside or outside their home independently. Therefore, a wheelchair that can satisfy their requirements is on demand. In this research we used an integrated product development to design a wheelchair. We simulated the ergonomic design by a method so called RULA for static load 150 kg. This proposed wheelchair is an ergonomic wheelchair. It is a wheelchair, that satisfies the safety regulations. By using a joystick, a user can control the wheelchair to move forward and backward, to set the seat up and down as convenience as they want to. We hope that this wheelchair can help the physical handicaps to move more freely and have more activities than before. Abstract in Bahasa Indonesia : Hasil kuisioner yang disebarkan ke pemakai kursi roda di kota Surabaya pada akhir 2005 dan awal 2006 menunjukkan bahwa 70% reponden tidak menginginkan lagi didampingi oleh seorang pemandu para saat mereka beraktifitas di dalam maupun di luar rumah. Sehingga, sebagai transportasi yang sangat dibutuhkan oleh penderita cacat kaki, kursi roda perlu untuk dikembangkan berdasarkan permintaan dan keinginan mereka. Pada makalah ini akan dipaparkan metode pengembangkan kursi roda yang didasarkan pada metode pengembangan produk terintegrasi. Melalui analisa kekuatan material pada beban statis 150 kg dan simulasi kenyamanan dengan metode RULA, dapat dirancang sebuah kursi roda yang aman dan nyaman, dapat bergerak maju mundur, tempat duduk dapat naik turun serta seluruh gerakannya dikontrol sendiri oleh pemakai kursi roda. Pengembangan kursi roda ini diharapkan dapat meningkatkan ruang gerak penderita cacat kaki dalam beraktifitas. Kata kunci: kursi roda, transportasi, aman, nyaman, simulasi, RULA.
On Modelling and Solving Heterogeneous Vehicle Routing Problem with Multi-Trips and Multi-Products Setiawan, Fran; Masruroh, Nur Aini; Pramuditha, Zita Iga
Jurnal Teknik Industri Vol. 21 No. 2 (2019): December 2019
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (672.059 KB) | DOI: 10.9744/jti.21.2.91-104

Abstract

Vehicle routing problem (VRP) is a model to determine an optimal routing plan for a fleet of homogeneous vehicles to serve a set customer which some operational constraints are satisfied. In most practical distribution problems, customer demands are served using heterogeneous fleet of vehicles. This kind of VRP is called Heterogeneous Vehicle Routing Problem (HVRP). HVRP has evolved into a rich research area because of its practical. There were many studies of rich extensions of the standar HVRP. This research aims to enrich the extentions of HVRP which is motivated by real case in one of pharmacy distribution company in Indonesia which is delivered multi-products to its 55 customers by allowing some vehicles which has small capacity to perform multi-trips. This problem is called Heterogeneous Vehicle Routing Problem with Multi-Trips and Multi-Products (HVRPMTMP).The mixed integer linear programming is developed based on four-index vehicle flow formulation. The model can be used generally in the same context of distribution problem. HVRPMTMP is generally NP-Hard problem, so the computational time using branch and bound in LINGO 16.0 is increasing exponentially by increasing the number of customers. Genetic algorithm is proposed to solve the real case. The result of the proposed GA can reduce the total cost from Rp 352540.6,- to Rp 180555,- or 48.78% from the current company policy.
ALGORITMA PENENTUAN TITIK PENCEKAMAN HOLE-BASED MODULAR FIXTURE Nudu, Josef Hernawan; Toh, Isa Setiasyah
Jurnal Teknik Industri Vol 10, No 2 (2008): DECEMBER 2008
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (226.542 KB) | DOI: 10.9744/jti.10.2.pp. 112-123

Abstract

This article illustrates fixturing algorithm for determining clamping point of hole-based modular fixture. The proposed algorithm is based on the algorithm developed by Ariastuti et al. The previous algorithm could be applied for determining clamping point of dedicated or slot-based modular fixture but it can not be applied directly for hole-based modular fixture. Conversion of locators? coordinate and clamping coordinate into coincident baseplate-coordinates and an approach for modeling the magnitude and action point of equivalent forces are proposed. This algorithm is designed for fixturing prismatic workpart having machining feature(s) being processed on a vertical milling machine. The machining features are hole, blind hole, pocket, slot, blind slot, step, and blind step. Three hypothetical worksamples were analyzed using Ariastuti?s algorithm and this new algorithm. The result shows that both algorithms have the same properties in terms of feasible fixturing and unfeasible fixturing on a single setup.The new algorithm gives coordinates that coincide with holes of related baseplate in feasible fixturing. Forces equilibrium during machining is the only aspect being considered for feasibity analysis. Fixture elements? dimension, strength, and deformation have not been considered yet. Abstract in Bahasa Indonesia: Makalah ini memaparkan algoritma fixturing untuk penentuan titik pencekaman fixture modular jenis hole yang dikembangan dari algoritma Ariastuti et al. Algoritma Ariastuti et al. dapat digunakan untuk menentukan titik pencekaman dedicated fixture dan modular fixture jenis slot, namun tidak dapat diterapkan secara langsung pada modular fixture jenis hole. Algoritma usulan menambahkan satu tahapan berupa penyesuaian koordinat lokator dan klem yang bersesuaian dengan posisi lubang pada plat dasar modular fixture jenis hole. Algoritma yang diusulkan berbeda dalam hal penentuan besar dan titik tangkap gaya potong ekivalen, serta penentuan titik pencekaman yang dipilih. Penelitian dibatasi pada fixturing benda kerja prismatik yang memiliki feature hole, blind hole, pocket, slot, blind slot, step, dan blind step untuk pemesinan pada mesin milling vertikal. Fisibilitas fixturing ditentukan oleh kondisi kesetimbangan gaya selama proses pemesinan. Aplikasi algoritma usulan pada tiga buah benda uji hipotetis memberikan hasil yang setara dengan algoritma Ariastuti et al.; berupa kondisi fixturing fisibel atau tidak fisibel. Hasil kondisi fixturing yang fisibel adalah titik lokator dan klem yang bersesuaian dengan posisi susunan lubang pada plat dasar fixture modular untuk pemesinan benda kerja dalam satu kali setup. Algoritma yang dikembangkan belum mempertimbangkan kendala dimensi dan kekuatan elemen fixture serta deformasi. Kata kunci: fixture modular, fixturing, titik pencekaman
KOMPARASI SISTEM MANUFAKTUR PUSH DAN PULL MELALUI PENDEKATAN SIMULASI Wibisono, Eric
Jurnal Teknik Industri Vol 6, No 1 (2004): JUNE 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (79.142 KB) | DOI: 10.9744/jti.6.1.pp. 71-78

Abstract

Manufacturing systems that are often classified as push and pull often invite question: "How far do the differences between those two systems exist?" Many researches have been carried out but succinct answer to the above question is always difficult to reach. The difficulty roots from the variety of definition of the push and pull systems itself and also from the variety of complexity of a manufacturing system. This paper attempts to study the differences in performance between push and pull systems in a relatively simple model that consists of 4 serial processors with buffers located between these processors. Variations being modelled is on the setting of the system's load (high and low) and the buffer size with performance being measured include machine utilization, number of outputs and mean flow time of jobs. The approach used is simulation using ProModel software as the tool. From the experiments it can be derived that buffer size turns out to be a very critical factor in system performance. Moreover, it is also proved that when the buffer size is large, push and pull systems do not differ significantly. Abstract in Bahasa Indonesia : Sistem manufaktur yang umumnya dikategorikan menjadi sistem push dan pull sering mengundang pertanyaan: "Seberapa jauh perbedaan dari kedua sistem tersebut ada?" Banyak penelitian telah dilakukan namun jawaban yang lugas atas pertanyaan tersebut sulit diperoleh. Kesulitan ini umumnya berakar dari beragamnya definisi sistem push dan pull itu sendiri serta variasi dari kompleksitas suatu sistem manufaktur. Makalah ini mencoba melihat perbedaan antara kinerja sistem push dan pull dalam suatu model sederhana yang terdiri dari 4 prosesor serial dengan buffer yang diletakkan di antara masing-masing prosesor tersebut. Variasi yang dilakukan adalah pada setting beban kerja sistem (padat dan ringan) dan ukuran buffer dengan kinerja yang diukur adalah utilisasi mesin, jumlah output dan rata-rata waktu tinggal job. Pendekatan yang dipakai adalah simulasi dengan alat bantu software ProModel. Dari eksperimen yang dilakukan didapatkan hasil bahwa ukuran buffer sangat berpengaruh terhadap kinerja sistem. Secara khusus juga dibuktikan bahwa pada ukuran buffer besar, ternyata antara sistem push dan pull tidak memiliki perbedaan yang signifikan. Kata kunci: sistem push-pull, simulasi, buffer.
PENENTUAN RUTE TRUK PENGUMPULAN DAN PENGANGKUTAN SAMPAH DI BANDUNG Fitria, Lisye; Susanty, Susy; Suprayogi, Suprayogi
Jurnal Teknik Industri Vol 11, No 1 (2009): JUNE 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (92.146 KB) | DOI: 10.9744/jti.11.1.pp. 51-60

Abstract

The garbage collection constitutes the main contributor in terms of the garbage cost management. Garbage collection scheduling model is a variable that determine cost center. Regarding to the existing condition, scheduling model could be designed concerning to the constraints, such as: amount of vehicles, transportation time, and transport system. This research develops a Vehicle Routing Problem (VRP) model for determining the optimal route in garbage gathering collection. The VRP model utilizes intermediate facility. This model is called the Vehicle Routing Problem with Multiple Trips and Intermediate Facility (VRPMTIF). The VRPMTIF is solved by using a Sequential Insertion Algorithm. The algorithm applied to the determine garbage collections routes in Bandung with result as follows: 28 vehicles for West Bandung, 41 vehicles for Central Bandung, and 68 vehicles for East Bandung where there are different accomplishment time for each scenario. Abstract in Bahasa Indonesia: Proses pengumpulan sampah merupakan kontributor terbesar dalam biaya pengelolaan sampah. Rute pengumpulan sampah adalah faktor penentu biaya pengelolaan sampah. Rute pengumpulan sampah dapat dibuat dengan memperhatikan keterbatasan yang ada seperti: jumlah kendaraan, waktu angkut dan sistem pengangkutan yang dilakukan. Penelitian ini bertujuan untuk menentukan rute pengumpulan dan pengangkutan sampah. Kondisi pengumpulan sampah dapat dianalogikan dengan model Vehicle Routing Problem dengan menambahkan intermediate facility pada akhir rute, yakni tempat pembuangan sampah akhir. Model ini disebut Vehicle Routing Problem with Multiple Trips and Intermediate Facility (VRPMTIF). Penentuan rute pengumpulan sampah VRPMTIF diselesaikan dengan menggunakan algoritma sequential insertion. Algoritma tersebut diterapkan pada penentuan rute pengumpulan sampah di Kota Bandung dengan hasil sebagai berikut: 28 tur untuk Bandung Barat, 41 tur untuk Bandung Tengah, dan 68 tur untuk Bandung Timur dengan waktu penyelesaian yang berbeda untuk setiap skenario. Kata kunci: Vehicle Routing Problem, multiple trips, intermediate facility, algoritma sequential insertion
Algoritma Genetika untuk Mengoptimasi Penjadualan Pembersihan Jaringan Penukar Panas Biyanto, Totok Ruki
Jurnal Teknik Industri Vol 17, No 1 (2015): JUNE 2015
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1000.5 KB) | DOI: 10.9744/jti.17.1.53-60

Abstract

The resulting MINLP problem is very complex and finding the global optimum is a challenging task. Solving this problem can use two methods, namely deterministic and metaheuristic. Deterministic method requires enough knowledge to determine areas that can provide global optimum solution. This method sometime provide unconvergen solution. Another method is metaheuristic method that simple and promising global optimum solution without introducing any approximations or simplifying assumptions. This method works without influenced by the previous optimization results. One of metaheuristic algorithms is Genetic Algorithm (GA). In this paper, the GA will be used to solve the optimization of cleaning schedule of Heat Exchanger Network (HEN) in a refinery Crude Preheat Train (CPT). The results showed that efficiency of HEN 23% increased which can be translated in IDR 14.1 Billion of fuel saving. Metaheuristic algorithm always provide a solution at the end of optimization’s iteration and it can be run  continuesly in order to get more optimal solution.

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