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All Journal Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Research Report - Engineering Science Jurnal Rekayasa Sistem Industri Journal of Engineering and Management in Industrial System Jurnal Optimasi Sistem Industri Jurnal Ilmiah Teknik Industri Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri SAINTEK: Jurnal ilmiah Sains dan Teknologi Industri Jurnal Teknik Industri Terintegrasi (JUTIN)
Carles Sitompul
Teknik Industri, Universitas Katolik Parahyangan
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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PENGEMBANGAN DIMENSI KUALITAS LAYANAN E-BANKING DAN HUBUNGANNYA DENGAN KEPUASAN SERTA LOYALITAS KONSUMEN Tan, Alfian; Sukapto, Paulus; Sitompul, Carles
Jurnal Ilmiah Teknik Industri Vol. 13, No. 1, Juni 2014
Publisher : Universitas Muhammadiyah Surakarta

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

Abstract

SERVQUAL is a service quality measurement model that is assumed to be widely applicable in every sector of service industry, yet research proves the opposite. Characteristic of customer in each segment can be a factor that causes differences in measurement model. According to that fact, this research is conducted to identify the difference of measurement model in each customer segment, especially in e-banking industry. Not only we identify the measurement model,  this research is done to confirm the relationship between 3 constructs as well, which are service quality, satisfaction, and loyalty. Several statistical method will be introduced here in relationship with segmentation process, measurement model identification, dan the three constructs validation process. Segmentation process yields 2 customer segments which are people with high and moderate expectation to service quality. In the first segment, the measurement model consists of 4 quality dimensions, which are fullfilment, efficiency, assurance, and web design while there are 5 dimensions in the second segment which are fulfillment, responsiveness, information technology, assurance, and efficiency. There are also significant relationships among service quality, satisfaction, and loyalty.
Perancangan Model VMI (Vendor Managed Inventory) dengan Satu Pemasok dan Banyak Retailer yang Meminimasi Ongkos Total Rantai Pasok Yosefa, ~; Sitompul, Carles; Alfian, ~
Jurnal Rekayasa Sistem Industri Vol 4, No 2 (2015): Jurnal Rekayasa Sistem Industri
Publisher : Jurnal Rekayasa Sistem Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (252.41 KB)

Abstract

pertumbuhan ekonomi yang terjadi di negara tersebut. Untuk memenangkan kompetisi, perusahaanperusahaanberlomba memperbaiki kinerja mereka. Salah satu cara yang dilakukan adalahmenerapkan sistem persediaan barang yang lebih efisien yaitu dengan menerapkan manajemen supplychain yang akan memberikan keuntungan bagi pihak supplier maupun pihak retailer. VMI (VendorManaged Inventory) merupakan salah satu metode dalam supply chain yang memberikan keuntunganbagi perusahaan melalui waktu replenishment yang singkat, perbaikan customer service level, total biayarantai pasok yang lebih kecil dibanding metode persediaan tradisional. Penelitianpenelitianyang sudah dilakukan saat ini baru sebatas model VMI satu supplier dengan satu retailer. Padahalpada kenyataannya satu supplier dapat berhubungan dengan satu atau lebih retailer atau bahkansebaliknya banyak supplier yang berhubungan dengan 1 retailer. Kondisi seperti ini menyebabkanperlunya pengembangan model yang melibatkan banyak retailer maupun supplier.Dalam penelitian ini, dilakukan pengembangan model VMI yang dibatasi pada kondisi satusupplier dengan banyak retailer. Dilakukan penentuan parameter, variabel keputusan, fungsi tujuandan koefisien pembatas untuk merancang model. Model yang dirancang kemudian diimplementasikanke dalam bahasa pemrograman AMPL dan solusinya didapatkan dengan penggunaansoftware NEOS. Datadata yang digunakan merupakan data ilustrasi. Setelah didapat hasil daripengimplementasian model, selanjutnya dibuat analisis berdasarkan hasil serta analisis sensitivitasuntuk model. Hasil penggunaan model VMI (Vendor Managed Inventory) yang dirancang kemudiandibandingkan dengan hasil penggunaan metode lain, yaitu Q System serta WagnerWithin Algorithm.
Pengembangan Model Vendor Managed Inventory dengan Banyak Retailer yang Mempertimbangkan Ketidakpastian Lead Times Sitompul, Carles; Ariningsih, Paulina; Santosa, Ida Bagus Deva Narswara
Jurnal Rekayasa Sistem Industri Vol 7, No 1 (2018): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (338.004 KB) | DOI: 10.26593/jrsi.v7i1.2770.41-46

Abstract

An inventory management system in supply chains called Vendor Managed Inventory (VMI) is very promising due to the cost efficiency resulted from implementing such system. This research aims to develop a vendor managed inventory for multiple retailers. The model also takes into account lead time uncertainties from vendor to its retailers. A mathematical formulation for VMI with multiple retailers is first developed using deterministic lead times.  Subsequently, lead times uncertainties are then taken into account where modes lead times are broken into two components: modes and delays, each with their respective probabilities. In turn, an approximation model is used to solve the problem because the complexity aroused from the model is difficult to solve using analytical methods. It is shown that the proposed approximation method is able to solve VMI problem with multiple retailers and uncertain lead times.  Furthermore, the total inventory cost is significantly reduced when compared to the usual economic order quantity method because stockouts are less frequent.
Perancangan Model VMI (Vendor Managed Inventory) dengan Satu Pemasok dan Banyak Retailer yang Meminimasi Ongkos Total Rantai Pasok Yosefa, ~; Sitompul, Carles; Alfian, ~
Jurnal Rekayasa Sistem Industri Vol 4, No 2 (2015): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (252.41 KB) | DOI: 10.26593/jrsi.v4i2.1630.88-96

Abstract

pertumbuhan ekonomi yang terjadi di negara tersebut. Untuk memenangkan kompetisi, perusahaanperusahaanberlomba memperbaiki kinerja mereka. Salah satu cara yang dilakukan adalahmenerapkan sistem persediaan barang yang lebih efisien yaitu dengan menerapkan manajemen supplychain yang akan memberikan keuntungan bagi pihak supplier maupun pihak retailer. VMI (VendorManaged Inventory) merupakan salah satu metode dalam supply chain yang memberikan keuntunganbagi perusahaan melalui waktu replenishment yang singkat, perbaikan customer service level, total biayarantai pasok yang lebih kecil dibanding metode persediaan tradisional. Penelitianpenelitianyang sudah dilakukan saat ini baru sebatas model VMI satu supplier dengan satu retailer. Padahalpada kenyataannya satu supplier dapat berhubungan dengan satu atau lebih retailer atau bahkansebaliknya banyak supplier yang berhubungan dengan 1 retailer. Kondisi seperti ini menyebabkanperlunya pengembangan model yang melibatkan banyak retailer maupun supplier.Dalam penelitian ini, dilakukan pengembangan model VMI yang dibatasi pada kondisi satusupplier dengan banyak retailer. Dilakukan penentuan parameter, variabel keputusan, fungsi tujuandan koefisien pembatas untuk merancang model. Model yang dirancang kemudian diimplementasikanke dalam bahasa pemrograman AMPL dan solusinya didapatkan dengan penggunaansoftware NEOS. Datadata yang digunakan merupakan data ilustrasi. Setelah didapat hasil daripengimplementasian model, selanjutnya dibuat analisis berdasarkan hasil serta analisis sensitivitasuntuk model. Hasil penggunaan model VMI (Vendor Managed Inventory) yang dirancang kemudiandibandingkan dengan hasil penggunaan metode lain, yaitu Q System serta WagnerWithin Algorithm.
Pengembangan Model Blood Mobile Collection Routing Problem (BMCRP) pada Proses Pengumpulan Darah Iswari, Titi; Setiawan, Fran; Sitompul, Carles
Jurnal Rekayasa Sistem Industri Vol 7, No 2 (2018): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2747.15 KB) | DOI: 10.26593/jrsi.v7i2.2769.65-72

Abstract

This research develop a model of blood mobile collection using blood donor vehicle efficiently by determining the optimal route of blood collection to the points of blood collection. The model developed in the form of mixed integer nonlinear programming (MINLP) and this model is called Blood Mobile Collection Routing Problem (BMCRP). The purpose of this model is to minimize the total distance of the blood collection routing process in which each place of blood collection has the opening hours and the closing time (time windows) and the service time in each place. This study considers the blood age (spoilage time) for 6 hours to ensure blood quality. The mathematical model is then verified to determine whether the solution is in accordance with the characteristics of BMCRP. Verification is done by solving Blood Mobile Collection Routing small cases. The simulation of solving BMCRP is done by generating eight hypothetical data sets of small cases based on vehicle routing data problems with different characteristics. Verification of BMCRP uses LINGO software. From the simulation results, the BMCRP model can obtain optimal solutions with minimum total distance travelled and does not violate any constraints on BMCRP.
PENGEMBANGAN DIMENSI KUALITAS LAYANAN E-BANKING DAN HUBUNGANNYA DENGAN KEPUASAN SERTA LOYALITAS KONSUMEN Tan, Alfian; Sukapto, Paulus; Sitompul, Carles
Jurnal Ilmiah Teknik Industri Vol. 13, No. 1, Juni 2014
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v13i1.305

Abstract

SERVQUAL is a service quality measurement model that is assumed to be widely applicable in every sector of service industry, yet research proves the opposite. Characteristic of customer in each segment can be a factor that causes differences in measurement model. According to that fact, this research is conducted to identify the difference of measurement model in each customer segment, especially in e-banking industry. Not only we identify the measurement model,  this research is done to confirm the relationship between 3 constructs as well, which are service quality, satisfaction, and loyalty. Several statistical method will be introduced here in relationship with segmentation process, measurement model identification, dan the three constructs' validation process. Segmentation process yields 2 customer segments which are people with high and moderate expectation to service quality. In the first segment, the measurement model consists of 4 quality dimensions, which are fullfilment, efficiency, assurance, and web design while there are 5 dimensions in the second segment which are fulfillment, responsiveness, information technology, assurance, and efficiency. There are also significant relationships among service quality, satisfaction, and loyalty.
Perancangan Model VMI (Vendor Managed Inventory) dengan Satu Pemasok dan Banyak Retailer yang Meminimasi Ongkos Total Rantai Pasok ~ Yosefa; Carles Sitompul; ~ Alfian
Jurnal Rekayasa Sistem Industri Vol. 4 No. 2 (2015): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (252.41 KB) | DOI: 10.26593/jrsi.v4i2.1630.88-96

Abstract

pertumbuhan ekonomi yang terjadi di negara tersebut. Untuk memenangkan kompetisi, perusahaanperusahaanberlomba memperbaiki kinerja mereka. Salah satu cara yang dilakukan adalahmenerapkan sistem persediaan barang yang lebih efisien yaitu dengan menerapkan manajemen supplychain yang akan memberikan keuntungan bagi pihak supplier maupun pihak retailer. VMI (VendorManaged Inventory) merupakan salah satu metode dalam supply chain yang memberikan keuntunganbagi perusahaan melalui waktu replenishment yang singkat, perbaikan customer service level, total biayarantai pasok yang lebih kecil dibanding metode persediaan tradisional. Penelitianpenelitianyang sudah dilakukan saat ini baru sebatas model VMI satu supplier dengan satu retailer. Padahalpada kenyataannya satu supplier dapat berhubungan dengan satu atau lebih retailer atau bahkansebaliknya banyak supplier yang berhubungan dengan 1 retailer. Kondisi seperti ini menyebabkanperlunya pengembangan model yang melibatkan banyak retailer maupun supplier.Dalam penelitian ini, dilakukan pengembangan model VMI yang dibatasi pada kondisi satusupplier dengan banyak retailer. Dilakukan penentuan parameter, variabel keputusan, fungsi tujuandan koefisien pembatas untuk merancang model. Model yang dirancang kemudian diimplementasikanke dalam bahasa pemrograman AMPL dan solusinya didapatkan dengan penggunaansoftware NEOS. Datadata yang digunakan merupakan data ilustrasi. Setelah didapat hasil daripengimplementasian model, selanjutnya dibuat analisis berdasarkan hasil serta analisis sensitivitasuntuk model. Hasil penggunaan model VMI (Vendor Managed Inventory) yang dirancang kemudiandibandingkan dengan hasil penggunaan metode lain, yaitu Q System serta WagnerWithin Algorithm.
Pengembangan Model Blood Mobile Collection Routing Problem (BMCRP) pada Proses Pengumpulan Darah Titi Iswari; Fran Setiawan; Carles Sitompul
Jurnal Rekayasa Sistem Industri Vol. 7 No. 2 (2018): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2747.15 KB) | DOI: 10.26593/jrsi.v7i2.2769.65-72

Abstract

This research develop a model of blood mobile collection using blood donor vehicle efficiently by determining the optimal route of blood collection to the points of blood collection. The model developed in the form of mixed integer nonlinear programming (MINLP) and this model is called Blood Mobile Collection Routing Problem (BMCRP). The purpose of this model is to minimize the total distance of the blood collection routing process in which each place of blood collection has the opening hours and the closing time (time windows) and the service time in each place. This study considers the blood age (spoilage time) for 6 hours to ensure blood quality. The mathematical model is then verified to determine whether the solution is in accordance with the characteristics of BMCRP. Verification is done by solving Blood Mobile Collection Routing small cases. The simulation of solving BMCRP is done by generating eight hypothetical data sets of small cases based on vehicle routing data problems with different characteristics. Verification of BMCRP uses LINGO software. From the simulation results, the BMCRP model can obtain optimal solutions with minimum total distance travelled and does not violate any constraints on BMCRP.
Pengembangan Model Vendor Managed Inventory dengan Banyak Retailer yang Mempertimbangkan Ketidakpastian Lead Times Carles Sitompul; Paulina Ariningsih; Ida Bagus Deva Narswara Santosa
Jurnal Rekayasa Sistem Industri Vol. 7 No. 1 (2018): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (338.004 KB) | DOI: 10.26593/jrsi.v7i1.2770.41-46

Abstract

An inventory management system in supply chains called Vendor Managed Inventory (VMI) is very promising due to the cost efficiency resulted from implementing such system. This research aims to develop a vendor managed inventory for multiple retailers. The model also takes into account lead time uncertainties from vendor to its retailers. A mathematical formulation for VMI with multiple retailers is first developed using deterministic lead times.  Subsequently, lead times uncertainties are then taken into account where modes lead times are broken into two components: modes and delays, each with their respective probabilities. In turn, an approximation model is used to solve the problem because the complexity aroused from the model is difficult to solve using analytical methods. It is shown that the proposed approximation method is able to solve VMI problem with multiple retailers and uncertain lead times.  Furthermore, the total inventory cost is significantly reduced when compared to the usual economic order quantity method because stockouts are less frequent.
A Market Scheduling for New Normal Logistics in the Wake of Corona Virus Diseases-19 in Bandung City Carles Sitompul; Paulina Kus Ariningsih; Fran Setiawan
Jurnal Rekayasa Sistem Industri Vol. 9 No. 2 (2020): Jurnal Rekayasa Sistem Industri (Edisi Khusus COVID-19)
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (788.661 KB) | DOI: 10.26593/jrsi.v9i2.4010.87-98

Abstract

Recent developments on the worldwide spread of Corona Virus Diseases-19 (COVID-19) show the vulnerability of human beings to pandemic risks in terms of biological, social, and economic factors. While human lives are the most important factor, a proposed solution dealing with pandemics should be sustainable which also includes other factors. Quarantines and physical distancing have been seen as effective ways to slow down the spread of COVID-19.  We therefore propose a market scheduling model with multi-objectives to support physical distancing minimizing the number of people in a certain area in a given time (crowds) and minimizing the virus spread rates. An analytical model is proposed and solved for Bandung City. The results show some promising ideas on how to slow down the virus spread without compromising both health and economic objectives. The future potential research of the model is also presented.
Co-Authors Alberto, Giovano Ariningsih, Paulina Cynthia Prithadevi Juwono Dedy Suryadi Hari Adianto Hari Adianto Ida Bagus Deva Narswara Santosa Irma Felicia Iswari, Titi Johanna Hariandja Johanna Hariandja Johanna Hariandja Johanna Renny Octavia Hariandja Kinley Aritonang Noor, Vicky Rizky Paulina Ariningsih Paulina Kus Ariningsih, Paulina Kus Paulus Sukapto Ryanto Jonathan Santosa, Ida Bagus Deva Narswara Setiawan, Fran Susana Susana Susana Susana Tan, Alfian Yohanes Dicka Pratama ~ Yosefa ~ Yosefa, ~