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Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri

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Published by Universitas Kristen Petra Surabaya

ISSN : 14112485 EISSN : 20877439 DOI : -

Core Subject : Engineering,

Industrial & Manufacturing 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 405 Documents

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PENJADWALAN JOBS PADA SINGLE MACHINE DENGAN MEMINIMUMKAN VARIANS WAKTU PENYELESAIAN JOBS Studi Kasus di P.T. XYZ I Gede Agus Widyadana; Fenny Nilawati Kusuma; I Nyoman Sutapa
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 3 No. 1 (2001): JUNE 2001
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper discusses a jobs scheduling on a single machine to minimize variance of job completion time. The objective is especially important in situations where it is desirable to provide customers or jobs with approximately the same treatment. In this case, data are collected from P.T. 'XYZ'. The focus of discussion is LB/KB Departement (Leather Board/Carton Board) with carton board's production line, which produces carton board. Carton board's size is 150 x 110 cm and its thickness from 0,6 mm to 2,5 mm. In this paper a comparison analysis, the deviation of the objective value given by a heuristic (Vh) method from the objective value given by P.T. 'XYZ' (Vp), is made. The percentage of deviation Vh from Vp is 50,36 %, which shows that the performance of heuristic is better, that is variance of job completion time by heuristic method smaller than by P.T. 'XYZ'. Besides the above discussion, the weakness dan superiority of heuristic are analyzed too. Abstract in Bahasa Indonesia : Makalah ini membahas penjadwalan jobs pada single machine dengan tujuan meminimumkan varians waktu penyelesaian job, yaitu untuk memberikan konsumen atau jobs kurang lebih perlakuan yang sama. Data yang diambil dalam pembahasan ini berasal dari perusahaan P.T. 'XYZ', di mana departemen yang menjadi fokus pembahasan adalah Departemen LB/KB (Leather Board/Karton Board) dengan lintasan produksi karton board yang menghasilkan produk carton board ukuran 150 x 110 cm, dengan ketebalan 0,6 mm sampai dengan 2,5 mm. Dalam makalah ini dilakukan analisis perbandingan jadwal jobs pada proses produksi di perusahaan yang telah ada dengan jadwal jobs menggunakan metode heuristic, yaitu menggunakan persentase penyimpangan Vh (varians waktu penyelesaian jobs metode heuristic) dari Vp (varians waktu penyelesaian jobs perusahaan). Dari hasil analisis didapatkan bahwa persentase penyimpangan Vh dari Vp sebesar 50,36%, hal ini menunjukkan bahwa performance metode heuristic lebih baik, yaitu varians waktu penyelesaian jobs-nya lebih kecil daripada metode perusahaan. Selain itu, dalam makalah juga dianalisis kelemahan dan keunggulan metode heuristic yang digunakan dalam penjadwalan pada single machine. Kata kunci : penjadwalan single-machine, varians waktu penyelesaian, prosedur heuristic.

Uncapacitated Pricing Optimization for Mobile Broadband Services Fransiscus Rian Pratikto
Jurnal Teknik Industri Vol. 20 No. 1 (2018): June 2018
Publisher : Institute of Research and Community Outreach - Petra Christian University

The success of revenue management starting in the mid-1980s has been driving pricing decision to be more tactical and operational. Since then, statistics and operations research have been important tools in pricing and revenue optimization. This research seeks to determine optimal price for mobile broadband services of a particular service provider. The case study is mobile broadband services in Indonesian market. We made a plausible assumption that there is no capacity constraint. We used choice-based conjoint with hierarchical Bayes estimation method to derive individual part-worth utilities, based on which market simulation was run to obtain the price-response function. By combining this with information about market size, we came up with a number of data points representing the demand function. Instead of fitting the data points with some theoretical demand functions, we used monotonic cubic splines to interpolate the demand function. Accordingly, we did not use explicit demand functions in the optimization, but a numerical interpolation function to estimate demand for any particular price level. Using enumeration, we then came up with a recommended contribution-maximizing prices under one, two, and three fare-classes segmentation. We assumed a perfect segmentation where cannibalization and arbitrage were not present. Further, we discussed a generalized optimal segmentation problem under that assumption. We also investigated the impact of the changes in competitors’ service attributes on the optimal prices.

KOMITMEN DAN KAPABILITAS UNTUK MENINGKATKAN KINERJA REVERSE LOGISTICS I Nyoman Sutapa
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 11 No. 2 (2009): DECEMBER 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

Artikel ini mengkaji pengaruh pengorganisasian dan pemanfaatan teknologi logistic dalam pengelolaan reverse logistics di perusahaan manufaktur penghasil barang/kemasan plastik terhadap kapabilitas inovasi dan komunikasi perusahaan dalam meningkatkan kinerja reverse logistics perusahaan. Analisis yang digunakan adalah Structural Equation Modeling dengan menggunakan program SmartPLS. Hasil penelitian menunjukkan bahwa pengelolaan reverse logistics melalui alokasi anggaran dan pembentukan unit pengelola tersendiri disertai pendayagunaan teknologi, terutama pertukaran data secara elektronik, mampu meningkatkan kapabilitas inovasi, khususnya kemampuan kustomisasi dan fleksibilitas perusahaan dalam meningkatkan kinerja reverse logistics, dalam hal ketepatan waktu dan biaya operasional yang rendah. Di sisi lain, kapabilitas komunikasi belum terbukti dapat memengaruhi kinerja reverse logistics dikarenakan kapabilitas yang dimiliki belum dimanfaatkan secara optimal.

APPLICATION OF FUZZY COGNITIVE MAPS ON POLICY ANALYSIS: DETERMINING THE POLICY OF SUPPORTING THE ACADEMIC SPIN OFFS Danny P. Soetanto
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 4 No. 2 (2002): DECEMBER 2002
Publisher : Institute of Research and Community Outreach - Petra Christian University

Fuzzy Cognitive Map (FCM) is a type of artificial neural network. It can be viewed as a weighted directed graph in which vertices represent concepts and edges represent causal links between them. An FCM can be used as an intelligent decision support system (DSS) tool. It works by representing important issues in a given situation and their causal relationships. The evolution of a dynamic system with time can be simulated and the behavior of the systems can be predicted and explained using an FCM. In this case FCM is used to ditermine the policy to support the academic spin off. Simulation brings forth some conclusions and the best policy can be chosen.

Assessing the Impact of IT Competency on Organizational Learning Capability of Indonesian Manufacturing Firms Alizar Hasan
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 12 No. 2 (2010): DECEMBER 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper attempt to assessing the impact of IT competency on organizational learning capability by using the measurement scale that have been developed by Tippins et al. and Gomes et al. These studies cover a sample of 192 manufacturing firms. IT competencies are classified into three dimensions: IT knowledge, IT operations, and IT objects, and organizational learning capability are classified into four dimensions: Managerial commitment, System perspec-tive, Openness and experimentation, and Knowledge transfer and integration. The result of factor analysis on IT competency and Organizational learning capability show that all items have high loading only on a single factor with ranging from .60 to .84. The findings revealed that IT competency positively and significantly influences the organizational learning capability of Indonesian manufacturing firms.

SOLVING THE DEGREE CONSTRAINED MINIMUM SPANNING TREE PROBLEM USING TABU AND MODIFIED PENALTY SEARCH METHODS Wamiliana Wamiliana
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 6 No. 1 (2004): JUNE 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

In this paper we consider the Degree Constrained Minimum Spanning Tree Problem. This problem is concerned with finding, in a given edge weighted graph G (all weights are non-negative), the minimum weight spanning tree T satisfying specified degree restrictions on the vertices. This problem arises naturally in communication networks where the degree of a vertex represents the number of line interfaces available at a center. Because of its NP-completeness, a number of heuristics have been proposed. In this paper we propose two new search methods: one based on the method of Tabu search and the other based on a penalty function approach. For comparative analysis, we test our methods on some benchmark problems. The computational results support our methods.

Deteksi Keausan Alat pada Proses Pengeboran Sumber Alam Siana Halim; Felecia .
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 14 No. 2 (2012): DECEMBER 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

In this paper we applied change point detection methods for failures detection in the drilling process. We calculated the change points on three drilling parameters, i.e., the weight on bit, top drive torque and rate of penetration. Using the concept of reliability, we measured the time between change points as the time between failures. The minimum of mean time between change points from those three parameters is suggested to be the time for monitoring the drilling process.

EVALUASI KONSEP PRODUK DENGAN PENDEKATAN GREEN QUALITY FUNCTION DEPLOYMENT II Septin Puji Astuti; Udisubakti Ciptomulyono; Mokh. Suef
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 6 No. 2 (2004): DECEMBER 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

The population of green consumer have been increasing enormously over last few decades. Hence, many managers prefer to reduce or to avoid environmental impact that may arise from their industrial activity, including product design and development. Regarding that phenomenon, this paper describes the Green Quality Function Deployment (QFD) II method that is utilized to evaluate the concept of lamp. The Green QFD II integrates quality, environmental, and cost aspects into Concept Comparison House (CCH). Weight of each aspects has been determined by utilizing the Analitic Hierarchy Process (AHP) method. The best product and it characteristics are presented at the las section of this paper. Abstract in Bahasa Indonesia : Semakin berkembangnya green consumer menyebabkan banyak industri yang mulai memikirkan masalah lingkungan dalam setiap aktifitasnya, seperti halnya dalam proses perancangan dan pengembangan produk. Pada artikel ini akan dibahas metode Green Quality Function Deployment (QFD) II yang diterapkan untuk mengevaluasi konsep produk lampu. Metode ini tidak hanya mempertimbangkan aspek kualitas tetapi juga memperhatikan aspek lingkungan dan biaya ke dalam matriks-matriksnya. Ketiga aspek tersebut masing-masing dijabarkan dalam Quality House, Green House, dan Cost House. Untuk memberi bobot pada tiap aspek, pada penelitian ini digunakan metode Analitic Hierarchy Process. Pada Green QFD II ini, untuk mengevaluasi konsep produk digunakan matriks Concept Comparison House (CCH) yang mampu mengintegrasikan aspek kualitas, lingkungan, dan biaya. Hasil dari penelitian ini adalah diperoleh konsep lampu terbaik dan karakteristik lampu yang berkualitas, ramah lingkungan, dan biaya rendah. Kata kunci: Green QFD II, Multicriteria analysis, Environmental manufactur, green design, sustainable development.

Model Penentuan Nilai Target Functional Requirement Berbasis Utilitas Cucuk Nur Rosyidi
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 14 No. 1 (2012): JUNE 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

In a product design and development process, a designer faces a problem to decide functional requirement (FR) target values. That decision is made under a risk since it is conducted in the early design phase using incomplete information. Utility function can be used to reflect the decision maker attitude towards the risk in making such decision. In this research, we develop a utility-based model to determine FR target values using quadratic utility function and information from Quality Function Deployment (QFD). A pencil design is used as a numerical example using quadratic utility function for each FR. The model can be applied for balancing customer and designer interest in determining FR target values.

PENINGKATAN JAMINAN KUALITAS ASSEMBLY LINE (Studi Kasus di Industri Otomotif) Halim Junaidi; Arigraha Santoso; I Nyoman Sutapa; Jani Rahardjo
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 7 No. 2 (2005): DECEMBER 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

The paper presents the improvement of quality assurance at an automotive industry which produces multi-purpose vehicle. Their multi-purpose vehicle is a global product, which means that it should concern not only domestic market demand but also international market demand and specification. Thus to maintain customer satisfaction on product quality, one of the efforts can be done to improve quality assurance level is by implementing Quality Assurance Network activity. Abstract in Bahasa Indonesia : Artikel ini membahas peningkatan jaminan kualitas assembly line di industri otomotif yang memproduksi kendaraan niaga. Kendaraan ini adalah produk yang bertaraf global, artinya kendaraan niaga yang harus mampu memenuhi bukan hanya permintaan pasar domestik melainkan juga spesifikasi dan permintaan pasar mancanegara. Oleh sebab itu untuk tetap dapat mempertahankan kepuasan konsumen terhadap kualitas produk, salah satu upaya yang dapat digunakan meningkatkan jaminan kualitas perusahaan adalah dengan mengimplementasikan aktivitas quality assurance network. Kata kunci: jaminan kualitas, aktivitas quality assurance network.

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