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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.
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Articles 8 Documents
Search results for , issue "Vol. 11 No. 1 (2009): JUNE 2009" : 8 Documents clear
PENENTUAN RUTE TRUK PENGUMPULAN DAN PENGANGKUTAN SAMPAH DI BANDUNG Lisye Fitria; Susy Susanty; 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
INTEGRASI KEBIJAKAN PERSEDIAAN-TRANSPORTASI (PENGIRIMAN LANGSUNG DAN BERBAGI) DI SISTEM RANTAI PASOK 4-ESELON Amelia Santoso; Senator Nur Bahagia; Suprayogi Suprayogi; Dwiwahju Sasongko
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 (251.806 KB) | DOI: 10.9744/jti.11.1.pp. 15-32

Abstract

Coordination among manufacturers, distributors and retailers is a key of success in supply chain management. Moreover, coordination is also needed in distributing product (managing inventory and transportation) from an echelon to its successive echelons. The transportation policy and inventory policy affect each others so the inventory and transportation policy should be integrated. This paper develops model of integrated inventory-transportation policies in 4-echelons supply chain systems that consist of a manufacturer, a distribution center, distributors and retailers. This model considers continuous production process as well as time-dependent demand. We consider direct and sharing shipping at distributor when we only consider direct shipping at manufacturer and distribution center. The production policy at the manufacturer, replenishment policies at the distribution center, distributors and retailers, and transportation policies at the manufacturer, distribution center and distributors will be determined in order to minimize system cost. The system cost consists of total costs at the manufacturer, distribution centers, distributors and retailers. Due to the model is classified as NP-hard model, the model is solved using genetic algorithm. From the result of genetic algorithm, the total system cost if the distributors who use sharing shipping as well as direct shipping, is lower stasitiscally than the distributors who only use direct shipping for delivering produk to their retailers. Abstract in Bahasa Indonesia: Koordinasi antar pabrik, distributor dan pengecer merupakan kunci keberhasilan dalam sistem rantai pasok. Koordinasi diperlukan saat pendistribusian produk (pengaturan persediaan dan transportasi) dari satu eselon ke eselon di bawahnya. Kebijakan transportasi mempengaruhi kebijakan persediaan dan sebaliknya oleh karena itu kedua kebijakan tersebut seharusnya ditetapkan secara terintegrasi. Paper ini mengembangkan model integrasi kebijakan persediaan-transportasi di sistem rantai pasok 4-eselon yang terdiri dari sebuah pabrik dengan proses produksi kontinu, sebuah gudang penyangga, multi distributor dan multi pengecer. Model ini mempertimbangkan permintaan yang bergantung pada waktu, pengiriman langsung di pabrik dan gudang penyangga serta pengiriman langsung dan berbagi di distributor. Paper ini menetapkan kebijakan produksi di pabrik, kebijakan pemesanan di gudang penyangga, distributor dan pengecer serta kebijakan transportasi di pabrik, gudang penyangga dan distributor untuk meminimumkan ongkos sistem. Ongkos sistem terdiri atas ongkos total di pabrik, gudang penyangga, distributor dan pengecer. Model yang dikembangkan termasuk dalam kategori NP-hard sehingga dikembangkan metode solusi yang berbasis pada algoritma genetika. Kesimpulan yang diperoleh dari hasil algoritma genetika menyatakan bahwa ongkos total sistem lebih kecil secara statistik jika pengiriman langsung dan berbagi dipergunakan di distributor dibandingkan hanya menggunakan pengiriman langsung. Kata kunci: integrasi, kebijakan persediaan, kebijakan transportasi, multi eselon
KESEIMBANGAN LINTASAN TIPE U- LINE ASSEMBLY PADA PERAKITAN POMPA AIR Pratikto Pratikto; Tanti Octavia
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 (156.093 KB) | DOI: 10.9744/jti.11.1.pp. 43-50

Abstract

Many companies strive for minimizing imbalance work station as well as number of work stations. Besides, the work station’s precedence and space curb also have to be considered. So far, there exist many solutions on those quests. Two of those solutions are the straight line and the U-type line balancing. In this paper, we compare the straight line balancing to U-type line balancing using Mixed Integer Programming (MIP), particularly, for solving the assembly line of water pumps production. Additionally, we employed LINGO to solve the MIP model. The result shows that the U-type line gives a better solution than the straight line balancing in term of number of work station. Moreover, it also shows that U-type line balancing is more efficient than the straight line balancing, significantly. Abstract in Bahasa Indonesia: Saat ini, secara umum banyak perusahaan dihadapkan pada masalah meminimalkan beban kerja yang tidak seimbang dan jumlah stasiun kerja dengan batasan proses serta lokasi yang ada. Banyak penelitian yang telah dilakukan untuk menyelesaikan permasalahan di atas. Penelitian ini bertujuan untuk membandingkan keseimbangan lintasan straight line dan tipe U-line menggunakan model mixed integer programming pada suatu perakitan pompa air. Model mixed integer programming diselesaikan dengan menggunakan LINGO. Hasil penelitian menunjukkan tipe U-line memberikan hasil yang lebih baik dibandingkan straight line berdasarkan jumlah work station dan lebih efisien secara signifikan. Kata kunci: keseimbangan lintasan, keseimbangan lintasan tipe U-line, mixed integer programming
PENGEMBANGAN TATA KELOLA INDUSTRI KECIL-MENENGAH DI MADURA Rachmad Hidayat; Yudha Herlambang
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 (276.632 KB) | DOI: 10.9744/jti.11.1.pp. 61-71

Abstract

This research aims to investigate the effectiveness of the governance assistance for the Maduranese Small Medium Enterprises. The aids were given though cooperation between SMES and state-owned companies, the easiness to get credit loans, entrepreneurial trainings. The Structural Equation Modeling (SEM) was employed to test the hypotheses which emerged from those conditions. Moreover, the AMOS 4.0 was also used to perform the SEM. The results showed that the easiness to get credit loan has not improved the SMEs’ performance directly, contradictively, it decreased their performances. Additionally, centralized entrepreneurial trainings also could not boost their performances. The only factor which has a positive impact was the cooperation between the SMEs and the state-owned companies. Based on these results, we therefore, propose policies that include the cooperation between state-owned as well as public companies and SMEs. Moreover, they also should aware on the Maduranesse culture. Abstract in Bahasa Indonesia: Penelitian ini mengkaji pengaruh tata kelola pembinaan pemerintah (bantuan Badan Usaha Milik Negara dan kredit perbankan dan kewirausahaan) terhadap kinerja Industri Kecil dan Menengah (IKM). Analisis yang digunakan untuk menjawab hipotesis adalah Structural Equation Modeling (SEM) dengan menggunakan program AMOS 4.0. Hasil penelitian menunjukkan bahwa pembinaan yang dilakukan pemerintah melalui pemberian kredit perbankan ternyata tidak serta merta dapat meningkatkan kinerja tetapi malah menurunkan kinerja. Demikian juga pola pendidikan kewirausahaan yang formal dan tersentralisasi terbukti tidak dapat meningkatkan kinerja IKM di Madura. Perumusan tentang beberapa kebijakan operasional yang perlu mendapatkan perhatian pihak pemerintah terutama penguatan di bidang usaha spesifik kekhasan budaya lokal. Pola kerja sama dengan Badan Usaha Milik Negara dengan pola bisnis murni mungkin bisa menjadi alternatif pembinaan pemerintah dengan berpegang teguh pada budaya masyarakat Madura. Kata kunci: bantuan Badan Usaha Milik Negara, kewirausahaan dan kinerja Industri Kecil Menengah.
MODEL JOINT ECONOMIC LOT SIZE PADA KASUS PEMASOK-PEMBELI DENGAN PERMINTAAN PROBABILISTIK Wakhid Ahmad Jauhari; I Nyoman Pujawan; Stefanus Eko Wiratno
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 (111.032 KB) | DOI: 10.9744/jti.11.1.pp. 1-14

Abstract

In this paper we consider single vendor single buyer integrated inventory model with probabilistic demand and equal delivery lot size. The model contributes to the current literature by relaxing the deterministic demand assumption which has been used for almost all integrated inventory models. The objective is to minimize expected total costs incurred by the vendor and the buyer. We develop effective iterative procedures for finding the optimal solution. Numerical examples are used to illustrate the benefit of integration. A sensitivity analysis is performed to explore the effect of key parameters on delivery lot size, safety factor, production lot size factor and the expected total cost. The results of the numerical examples indicate that our models can achieve a significant amount of savings. Finally, we compare the results of our proposed model with a simulation model. Abstract in Bahasa Indonesia: Pada penelitian ini akan dikembangkan model gabungan pemasok-pembeli dengan permintaan probabilistik dan ukuran pengiriman sama. Pada model setiap lot pemesanan akan dikirim dalam beberapa lot pengiriman dan pemasok akan memproduksi barang dalam ukuran batch produksi yang merupakan kelipatan integer dari lot pengiriman. Dikembangkan pula suatu algoritma untuk menyelesaikan model matematis yang telah dibuat. Selain itu, pengaruh perubahan parameter terhadap perilaku model diteliti dengan analisis sensitivitas terhadap beberapa parameter kunci, seperti ukuran lot, stok pengaman dan total biaya persediaan. Pada penelitian ini juga dibuat model simulasi untuk melihat performansi model matematis pada kondisi nyata. Kata kunci: model gabungan, permintaan probabilistik, lot pengiriman, supply chain
KINERJA ECONOMIZER PADA BOILER Muhammad Sjahid Akbar; Fredi Suryadi; Dedy Dwi Prastyo
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 (260.399 KB) | DOI: 10.9744/jti.11.1.pp. 72-81

Abstract

This paper employed the dual response approach for case of Multivariate Robust Parameter Design (MRPD) which is developed by Del Castillo and Miro Quesada. MRPD method can be applied for any design of experiment. The optimization in this method uses minimizing variance function with restriction on mean function. In this paper, MRPD is applied to the case of optimization of heat transfer efectivity and operational cost at economizer. Those two responses are optimized by setting the level of control factors; diametre of tube hole, transversal spacing, and fin nearness. Temperature of feedwater is hold as a noise factor. Optimization is calculated by fmincon in MATLAB 7.0. The optimal condition for heat tranfer efectivity is 77.17% and operational cost is 30.58 kW. The optimal condition is attained at diametre of tube hole 1.5 inch, transversal spacing 3.5 inch, and fin density 3 fin/inch. Abstract in Bahasa Indonesia: Penelitian ini menggunakan metode pendekatan dual response terhadap kasus Multivariate Robust Parameter Design (MRPD) yang dikembangkan oleh Del Castillo dan Miro Quesada. Metode MRPD tidak mensyaratkan jenis rancangan percobaan yang dapat digunakan dalam proses optimasi, yang dilakukan dengan meminimalkan fungsi varians terhadap kendala fungsi rerata. Pada penelitian ini, metode MRPD diterapkan untuk kasus pencarian nilai optimal respon yaitu efektifitas perpindahan panas dan biaya operasi pada economizer. Optimasi kedua respon dilakukan dengan cara mengoptimalkan level faktor kontrol diameter luar tubing, transversal spacing, dan kerapatan fin. Temperatur feedwater berlaku sebagai faktor noise. Optimasi dilakukan dengan bantuan fmincon pada MATLAB 7.0 yang menghasilkan kondisi optimum untuk efektifitas perpindahan panas sebesar 77,17% dan biaya operasi sebesar 30,58 kW. Kondisi tersebut dicapai pada saat level diameter luar tubing sebesar 1,5 inci, transversal spacing sebesar 3,5 inci, dan kerapatan fin sebesar 3 fin/inci. Kata kunci: Economizer, dual response, Multivariate Robust Parameter Design
MULTI OBJECTIVE MODEL FOR BALANCING U-TYPE ASSEMBLY LINE WITH PERMANENT AND TEMPORARY WORKERS Gede Agus Widyadana
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 (68.121 KB) | DOI: 10.9744/jti.11.1.pp. 33-42

Abstract

Assembly line balancing is one of the most important management decisions for reducing production costs. So far, many researches have been done in this area. In this research, we expand the U-type line-balancing using goal programming for multi objective model with two goals, i.e., minimized the number of temporary workers and number of cycle time in each station. Additionally, an example to illustrate the model, as well as some analyses is presented. Different amount of time for temporary worker to accomplish their tasks were generated. For some cases, the U-type assembly line is more efficient than the straight one. However, the goal 1 and goal 2 are conflicted
PENGADOPSIAN TEKNOLOGI RFID DI RUMAH SAKIT INDONESIA, MANFAAT DAN HAMBATANNYA Iwan Vanany; Awaluddin Bin Mohamed Shaharoun
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 (75.57 KB) | DOI: 10.9744/jti.11.1.pp. 82-94

Abstract

This paper explores the benefit and barriers of RFID (Radio Frequency Identification) technology adoption in Indonesian hospitals context. The investigation methods of this research used interview and semi-structured questionnaire on RFID consultants, RFID researchers, and big hospital managers in Java Island. The benefits and barriers of RFID technology adoption are identified from literature review. The barriers of RFID technology adoption are divided into two aspects, i.e., as business and technology aspects. The results of this study suggest that the benefits of RFID technology adoption are dominated of intangible benefit. Most of the respondents believed that the main barriers of RFID technology adoption are (1) the complexity of RFID technology (2) the lack of complete and valid information, and (3) there is no sufficient budget available. The detail of the outcomes and the implications of this reasarch are also discussed. Abstract in Bahasa Indonesia: Makalah ini berupaya mengeksplorasi manfaat dan hambatan dari pengadopsian teknologi RFID (Radio Frequency Identification) dalam konteks rumah sakit di Indonesia. Metode investigasi dari penelitian ini menggunakan wawancara dan kuesioner semi-struktur untuk konsultan, peneliti teknologi RFID dan manajer rumah sakit berkatagori besar di Pulau Jawa. Manfaat-manfaat dan hambatan-hambatan dari pengadopsian teknologi RFID telah diidentifikasi dari studi literatur. Hambatan dari pengadopsian teknologi RFID dibagi menjadi dua (2) aspek yaitu hambatan dari aspek bisnis dan teknologi. Temuan dari studi ini meyakini bahwa manfaat dari pengadopsian teknologi RFID didominasi oleh manfaat yang bersifat intangible. Sebagian besar responden meyakini bahwa hambatan utama dari pengadopsian teknologi RFID adalah: (1) kompleksnya teknologi RFID, (2) ketiadaan informasi yang lengkap dan valid, (3) tidak tersedianya anggaran yang cukup. Detail dari hasil studi dan implikasinya akan didiskusikan selanjutnya. Kata kunci: Pengadopsian teknologi RFID, Rumah sakit, Indonesia, Eksploratori.

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