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All Journal Jurnal Informatika Journal of Engineering and Technological Sciences Journal of ICT Research and Applications Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Jurnal Ergonomi dan K3
Tota Simatupang
Fakultas Teknologi Industri Institut Teknologi Bandung
Computer Science & IT Engineering Industrial & Manufacturing Engineering Public Health

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The Application of a Decision-making Approach based on Fuzzy ANP and TOPSIS for Selecting a Strategic Supplier Govindaraju, Rajesri; Akbar, Muhammad I.; Gondodiwiryo, Leksananto; Simatupang, Tota
Journal of Engineering and Technological Sciences Vol 47, No 4 (2015)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (320.425 KB) | DOI: 10.5614/j.eng.technol.sci.2015.47.4.5

Abstract

Supplier selection becomes very important when used in the context of strategic partnerships because of the long-term orientation of the relationship. This paper describes the application of a decision-making approach for selecting a strategic partner (supplier). The approach starts with defining a set of criteria that fits the company’s condition. In the next steps, a combination of fuzzy-ANP and TOPSIS methods is used to determine the weight for each criterion and rank all the alternatives. The application of the approach in an Indonesian manufacturing company showed that the three factors that got the highest weight were “geographical location”, “current operating performance”, and “reliability”. Geographical location got the highest weight because it affects many other factors such as reaction to changes in demand, after-sales service, and delivery lead-time.  Application of the approach helps decision-makers to gain effectiveness and efficiency in the decision-making process because it facilitates them to express their group’s collective preferences  while also providing opportunities for members to express their individual preferences. Future research can be directed at combining qualitative and quantitative criteria to develop the best criteria and methods for the selection of the best suppliers based on fuzzy ANP and TOPSIS.
PERANCANGAN SISTEM PREDIKSI CHURN PELANGGAN PT. TELEKOMUNIKASI SELULER DENGAN MEMANFAATKAN PROSES DATA MINING Govindaraju, Rajesri; Simatupang, Tota; Samadhi, TMA. Ari
Jurnal Informatika Vol 9, No 1 (2008): MAY 2008
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (413.782 KB) | DOI: 10.9744/informatika.9.1.33-42

Abstract

The purpose of this research is to design a customer churn prediction system using data mining approach. This system is able to perform data integration, data cleaning, data transformation, sampling and data splitting, prediction model building, predicting customer churn, and show the results in certain agreed forms. Churn prediction variables were identified based on earlier research reports that include customer information, payment method, call pattern, complaint data, telecommunication services usage and change of telecommunication services usage behavior data. The preferred mining technique used is the classification with decision tree algorithm. The decision tree can present visual model which represents customer churn and non churn pattern behavior. This system was tested using Kartu Halo customer data in Bandung area and testing result showed 70,94% accuracy of the prediction model. Abstract in Bahasa Indonesia : Penelitian ini bertujuan merancang sistem prediksi churn pelanggan yang memanfaatkan proses data mining. Sistem yang dihasilkan dapat melakukan integrasi data, pembersihan data, transformasi data, sampling dan pemisahan data, konstruksi model prediksi, memprediksi churn pelanggan dan menampilkan hasil prediksi dalam format laporan tertentu yang diperlukan. Identifikasi variabel-variabel prediksi churn dilakukan berdasarkan model prediksi churn yang telah dikembangkan pada penelitian terdahulu yang antara lain mencakup informasi mengenai pelanggan, metode pembayaran, data percakapan, data penggunaan jenis-jenis layanan telekomunikasi dan data yang menggambarkan perubahan perilaku penggunaan layanan telekomunikasi tersebut. Teknik mining yang dipilih adalah teknik klasifikasi dengan algoritma decision tree. Decision tree menghasilkan model visual yang merepresentasikan pola perilaku pelanggan yang churn dan tidak churn. Uji coba sistem yang dilakukan menggunakan data pelanggan Kartu Halo daerah Bandung menghasilkan tingkat akurasi model prediksi sebesar 70,94%. Kata Kunci : customer relationship management (CRM), churn, data mining, decision tree, sistem prediksi churn.
The Application of a Decision-making Approach based on Fuzzy ANP and TOPSIS for Selecting a Strategic Supplier Rajesri Govindaraju; Muhammad I. Akbar; Leksananto Gondodiwiryo; Tota Simatupang
Journal of Engineering and Technological Sciences Vol. 47 No. 4 (2015)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2015.47.4.5

Abstract

Supplier selection becomes very important when used in the context of strategic partnerships because of the long-term orientation of the relationship. This paper describes the application of a decision-making approach for selecting a strategic partner (supplier). The approach starts with defining a set of criteria that fits the company's condition. In the next steps, a combination of fuzzy-ANP and TOPSIS methods is used to determine the weight for each criterion and rank all the alternatives. The application of the approach in an Indonesian manufacturing company showed that the three factors that got the highest weight were "geographical location", "current operating performance", and "reliability". Geographical location got the highest weight because it affects many other factors such as reaction to changes in demand, after-sales service, and delivery lead-time.  Application of the approach helps decision-makers to gain effectiveness and efficiency in the decision-making process because it facilitates them to express their group's collective preferences  while also providing opportunities for members to express their individual preferences. Future research can be directed at combining qualitative and quantitative criteria to develop the best criteria and methods for the selection of the best suppliers based on fuzzy ANP and TOPSIS.
Requirement Volatility, Standardization and Knowledge Integration in Software Projects: An Empirical Analysis on Outsourced IS Development Projects Rajesri Govindaraju; Angra Bramagara; Leksananto Gondodiwiryo; Tota Simatupang
Journal of ICT Research and Applications Vol. 9 No. 1 (2015)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2015.9.1.4

Abstract

Information systems development (ISD) projects are highly complex, with different groups of people having  to collaborate and exchange their knowledge. Considering the intensity of knowledge exchange that takes place in outsourced ISD projects, in this study a conceptual model was developed, aiming to examine the influence of four antecedents, i.e. standardization, requirement volatility, internal integration, and external integration, on two dependent variables, i.e. process performance and product performance. Data  were collected from 46 software companies in four big cities in Indonesia. The collected data were examined to verify the proposed theoretical model using the partial least square structural equation modeling (PLS-SEM) technique. The results show that process performance is significantly influenced by internal integration and standardization, while product performance is  significantly influenced by external integration and  requirement volatility. This study contributes  to a better understanding of how knowledge integration can be managed in outsourced ISD projects in view of increasing their success.
Modeling the Competitiveness of Indonesian Palm Oil Industry: A Conceptual Model Using Hierarchical Multi-Level System Approach Roland Y.H. Silitonga; Senator Nur Bahagia; Tota Simatupang; Joko Siswanto
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 15 No. 2 (2013): DECEMBER 2013
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (650.224 KB) | DOI: 10.9744/jti.15.2.103-110

Abstract

Indonesian Palm Oil Industry has the largest market share in the world, but still faces problems in order to strengthen the level of competitiveness. Those problems are in the industry chains, government regulation and policy as meso environment, and macro economic condition. Therefore these three elements should be considered when analyzing the improvement of competitiveness. Here, the governmental element is hoped to create a conducive environment. This paper presents the industry competitiveness conceptual model, using hierarchical multilevel system approach. The Hierarchical multilevel system approach is used to accommodate the complexity of the industrial relation and the government position as the meso environment. The step to develop the model firstly is to define the relevant system. Secondly, is to formulate the output of the model that is competitiveness in the form of indicator. Then, the relevant system with competitiveness as the output is built into a conceptual model using hierarchical multilevel system. The conceptual model is then discussed to see if it can explain the relevant system, and the potential of it to be developed into mathematical model.
Change Management Perspectives in an ERP Module Implementation: A Case Study in a Telecommunication Company Tota Simatupang; Rajesri Govindaraju; Reni Amaranti
Jurnal Teknik Industri Vol. 18 No. 1 (2016): JUNE 2016
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.267 KB) | DOI: 10.9744/jti.18.1.51-62

Abstract

Successful Enterprise Resource Planning (ERP) projects require change management to support the integration of the ERP systems into work environment because ERP imple¬men¬tations involve lots of changes on technical infrastructures, business processes, organization structure, rules and skills of people in the organization. This study was aimed to explain the challenges in implementing an ERP module in a Indonesian telecommunication company, focusing on the change management process involves in the project. A case study at a tele¬com¬munication company was used to collect empirical data and to analyses important aspects of project arrangements that will have an impact on the change management process accompanying the ERP implementation project. The following two aspects of changes were analyzed as the impact of ERP implementation: changes in individual behaviors and changes in the organisational practices. Based on the empirical study, two important aspects of change management effectiveness in the project and post-project stage were highlighted: alignment of the organization structure to support IT-business collaboration and alignment of employee orientation towards effective use of ERP systems. Besides, this study also highlighted that it is important to plan and execute change management process in the post-project stage to obtain benefits from ERP implementation.
Pengaruh Gender dan Usia Pada Memori terhadap Iklan Banner Titah Yudhistira; Tota Simatupang
Jurnal Ergonomi dan K3 Vol 6, No 1 (2021): MARET 2021
Publisher : Perhimpunan Ergonomi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bidang kajian ergonomi kognitif, khususnya terkait dengan interaksi-manusia komputer, menjadi semakin penting dan relevan dewasa ini. Dengan berkembangnya pertukaran informasi dan perdagangan elektronik melalui internet, semakin banyak informasi terkait produk dan jasa yang disampaikan melalui iklan banner di berbagai website. Salah satu ukuran performansi dari iklan banner adalah konsumen dapat mengingat informasi, khususnya merek, yang diiklankan. Untuk itu perlu diketahui bagaimana perbedaan karakteristik konsumen memengaruhi memori akan banner tersebut. Dalam penelitian ini karakteristik konsumen yang diteliti difokuskan pada gender dan usia. Untuk menjawab efek dari gender dan usia terhadap kemampuan melakukan recall dan recognition terhadap banner dan merek di dalam banner tersebut, digunakan data hasil survei di tujuh negara yang melibatkan 21 kampanye iklan banner dan 8736 responden. Hasil pengolahan data menggunakan multilevel structural equation model menunjukkan bahwa pria memiliki kemampuan recall dan recognition pada banner dan merek lebih baik dibandingkan perempuan. Selain itu, sejalan dengan meningkatnya usia terdapat penurunan yang signifikan pada memori. Di dalam makalah ini juga didiskusikan alternatif penjelasan atas temuan ini serta implikasinya bagi rancangan banner yang lebih efektif dalam meningkatkan memori konsumen.
Co-Authors Angra Bramagara Joko Siswanto Joko Siswanto Leksananto Gondodiwiryo Leksananto Gondodiwiryo Leksananto Gondodiwiryo, Leksananto Muhammad I. Akbar Muhammad I. Akbar, Muhammad I. Rajesri Govindaraju Reni Amaranti Roland Y.H. Silitonga Roland Y.H. Silitonga Senator Nur Bahagia Senator Nur Bahagia Titah Yudhistira TMA. Ari Samadhi