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All Journal Jurnal Teknik Industri J@TI (TEKNIK INDUSTRI) REKA INTEGRA Forum Ilmu Sosial Prosiding SNATIF Jurnal Teknologi Pertanian Unnes Civic Education Journal Integritas: Jurnal Antikorupsi Rainbow : Journal of Literature, Linguistics and Cultural Studies
Suprayogi Suprayogi
Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences

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Model Integrasi Keputusan Lokasi, Perutean Kendaraan, dan Pengendalian Persediaan Pada Sistem Rantai Pasok Tiga Eselon Saragih, Nova; Nur Bahagia, Senator; Suprayogi, Suprayogi; Syabri, Ibnu
Jurnal Teknik Industri Vol 19, No 1 (2017): JUNE 2017
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (765.31 KB) | DOI: 10.9744/jti.19.1.1-10

Abstract

Keputusan lokasi, perutean kendaraan, dan kebijakan persediaan merupakan keputusan yang saling terkait satu dengan yang lain. Keputusan pengendalian persediaan, seperti ukuran lot pemesanan dan frekuensi pemesanan akan mempengaruhi baik itu ongkos persediaan dan ongkos transportasi. Sebagai contoh, pengiriman dalam kuantitas yang sedikit dan frekuensi yang sering menyebabkan pengurangan ongkos persediaan tetapi membutuhkan tambahan ongkos transportasi. Selanjutnya, keputusan perutean dan keputusan pengendalian persediaan akan mempengaruhi keputusan pemilihan lokasi sebab pemilihan lokasi ditentukan berdasarkan kriteria ongkos sistem minimum. Kegagalan dalam melibatkan ongkos persediaan dan ongkos transportasi ke dalam pertimbangan ketika memilih lokasi dapat menyebabkan sub-optimalitas sebab keputusan pemilihan lokasi memiliki dampak yang besar pada ongkos persediaan dan ongkos transportasi. Oleh karena itu, bagaimana memilih lokasi, menentukan rute kendaraan, dan mengendalikan persediaan yang optimal menjadi isu yang penting dalam merancang sebuah sistem logistik. Penelitian ini mengembangkan model integrasi yang secara simultan mengoptimisasikan keputusan lokasi, rute kendaraan, dan pengendalian persediaan pada sistem rantai pasok tiga eselon yang belum pernah dikembangkan sebelumnya. Entitas yang terlibat dalam rantai pasok kajian terdiri dari satu Pemasok, multi Depot, dan multi Ritel. Karakteristik permintaan yang dipertimbangkan dalam penelitian ini bersifat probabilistik dan jumlah produk terdiri dari satu produk. Model integrasi yang dikembangkan selanjutnya dipecahkan dengan metode optimal dan metode heuristik. Setelah dilakukan perbandingan dengan model dekomposisi diperoleh kesimpulan bahwa model integrasi menghasilkan ongkos total sistem yang lebih kecil.
Genetic Algorithm for Solving Location Problem in a Supply Chain Network with Inbound and Outbound Product Flows Suprayogi, Suprayogi; Bahagia, Senator Nur; Thaddeus, Yudi
Jurnal Teknik Industri Vol 18, No 2 (2016): DECEMBER 2016
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (583.942 KB) | DOI: 10.9744/jti.18.2.129-136

Abstract

This paper considers a location problem in a supply chain network. The problem addressed in this paper is motivated by an initiative to develop an efficient supply chain network for supporting the agricultural activities. The supply chain network consists of regions, warehouses, distribution centers, plants, and markets. The products include a set of inbound products and a set of outbound products. In this paper, definitions of the inbound and outbound products are seen from the region’s point of view.  The inbound product is the product demanded by regions and produced by plants which flows on a sequence of the following entities: plants, distribution centers, warehouses, and regions. The outbound product is the product demanded by markets and produced by regions and it flows on a sequence of the following entities: regions, warehouses, and markets. The problem deals with determining locations of the warehouses and the distribution centers to be opened and shipment quantities associated with all links on the network that minimizes the total cost. The problem can be considered as a strategic supply chain network problem. A solution approach based on genetic algorithm (GA) is proposed. The proposed GA is examined using hypothetical instances and its results are compared to the solution obtained by solving the mixed integer linear programming (MILP) model. The comparison shows that there is a small gap (0.23%, on average) between the proposed GA and MILP model in terms of the total cost. The proposed GA consistently provides solutions with least total cost. In terms of total cost, based on the experiment, it is demonstrated that coefficients of variation are closed to 0.
ALGORITMA GENETIKA UNTUK PEMECAHAN MASALAH RUTE KENDARAAN DENGAN UKURAN DAN CAMPURAN ARMADA, TRIP MAJEMUK, PENGIRIMAN TERBAGI, PRODUK MAJEMUK, DAN KENDARAAN DENGAN KOMPARTEMEN MAJEMUK Suprayogi, Suprayogi; Paillin, Daniel Bunga
Jurnal Teknik Industri Vol 19, No 2 (2017): Desember 2017
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (649.385 KB) | DOI: 10.9744/jti.19.2.115-124

Abstract

This paper discusses a variant of the basic vehicle routing problem (VRP) by including the following characteristics: fleet size and mix, multiple trips, split delivery, and multiple compartments. One of real cases of this problem is related to determining tanker?s routes in delivering fuel products from a supply port to a number of destination ports. Each tanker has several compartments where each compartment is dedicated to a certain fuel product. In this paper, a solution approach based on genetic algorithm (GA) is proposed and tested using nine hypothetical instances. Experiment results show that the proposed GA gives consistent results measured by coefficient variations
PEMECAHAN MASALAH RUTE KENDARAAN DENGAN TRIP MAJEMUK, JENDELA WAKTU DAN PENGANTARAN-PENJEMPUTAN SIMULTAN MENGGUNAKAN ALGORITMA GENETIKA Suprayogi, Suprayogi
J@ti Undip : Jurnal Teknik Industri Volume 12, No. 2, Mei 2017
Publisher : Departemen Teknik Industri, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (571.967 KB) | DOI: 10.14710/jati.12.2.95-104

Abstract

Masalah rute kendaraan (MRK) merupakan salah satu masalah keputusan yang memegang peranan penting dalam kegiatan transportasi dan distribusi dalam manajemen logistik. MRK terkait dengan penentuan rute-rute kendaraan yang meminimumkan total jarak yang ditempuh dengan memperhatikan pembatas-pembatas berikut: (1) tiap rute berawal dan berakhir di depot, (2) tiap kendaraan hanya melayani satu rute, (3) tiap pelanggan dilayani oleh satu rute, (4) seluruh pelanggan harus dilayani, dan (5) total muatan untuk tiap rute tidak melebihi kapasitas kendaraan. Dalam literatur, definisi ini merupakan definisi untuk MRK dasar atau klasik. Makalah ini membahas perluasan dari MRK dasar yang mencakup karakteristik-karakteristik berikut: (1) trip majemuk (TM), (2) jendela waktu (JW) dan (3) pengantaran-penjemputan simultan (AJS). Metode pemecahan berbasis algoritma genetika (AG) diusulkan untuk memecahkan MRK yang dibahas dalam makalah ini. AG yang diusulkan diuji-coba dengan menggunakan beberapa contoh hipotetik.AbstractVehicle routing problem (VRP) is one of decision problems having an important role in transportation and distribution activity in the logistic management. The VRP deals with determining vehicle routes that minimizes total distance by satisfying the following constraints: (1) each route starts and ends at the depot, (2) each vehicle serves only one route, (3) each costumer is served by one route, (4) all customers must be served, and (5) total load for each route does not exceed the vehicle capacity. In literature, this definition is the definition for the basic or classical VRP. This paper discusses an extension of the basic VRP including the following characteristics: (1)multiple trips (MT), (2) time windows (TW), and (3) simultaneous pickup-delivery (SPD). A solution method based on genetic algorithm (GA) is proposed to solve the VRP discussed in this papaer. The proposed GA is examined using some hypothetical instances.
MODEL PENENTUAN KUANTITAS PLASTIK BEKAS UNTUK HOME INDUSTRY DAUR ULANG DENGAN PENDEKATAN GOAL PROGRAMMING Verza, Mochamad; Suprayogi, Suprayogi; Susanty, Susy
REKA INTEGRA Vol 3, No 3 (2015): Edisi Kesebelas
Publisher : REKA INTEGRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (708.155 KB)

Abstract

Makalah ini membahas mengenai model reverse logistics yang terintegrasi dengan pendekatan goal programming untuk menyelesaikan masalah dengan multi-objective, kemudian untuk mencari jumlah plastik bekas yang optimal dari aspek ekonomi dan aspek lingkungan, yang diwakili oleh fungsi tujuan minimisasi biaya reverse logistics, minimisasi dampak lingkungan dan maksimisasi pengumpulan plastik bekas. Model dirancang untuk home industry plastik bekas di Kiaracondong kota Bandung. Model diimplementasikan untuk 1 recycling center, 1 collection center, 1 disposal center, 5 end customer, 1 first customer, dengan periode 1 bulan. Disimpulkan bahwa dari 6 kombinasi fungsi tujuan memiliki output berupa 2 kelompok pencapaian, dimana varian pertama fungsi tujuan maksimisasi pengumpulan plastik tidak tercapai, dan varian kedua dimana fungsi tujuan biaya reverse logistics tidak tercapai, hal ini karena perbedaan prioritas. Kata kunci : Reverse Logistics, Plastik Bekas, Goal Programming.   ABSTRACT This paper discusses the model of integrated reverse logistics with the goal programming approach to solve the problem with multi-objective, then to find the optimal amount of scrap plastic from the economic and environmental aspects, which are represented by the objective function minimization reverse logistics costs, minimization of environmental impact and maximization of collecting scrap plastic. The model is designed for home industry Kiaracondong used plastic in the city of Bandung. The model is implemented for 1 recycling center, 1 collection center, 1 disposal center, 5 end customer, 1 first customer, with a period of 1 month. It was concluded that the combination of the objective function of 6 has an output in the form of two groups of achievement, where the first variant of collecting plastic maximization objective function is not reached, and the second variant in which the function of reverse logistics cost goals are not achieved, it is because of differences in priorities. Keywords: Reverse Logistics, Scrap Plastic, Goal Programming.
Model Optimisasi untuk Penjadwalan Ulang Perjalanan Kereta Api Suprayogi, Suprayogi; Ramdhani, Hery
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 | DOI: 10.9744/jti.17.2.97-104

Abstract

This paper discusses the train rescheduling problem due to disturbances. The train rescheduling problem discussed in this paper is taken from a real train network of DAOP II Bandung in Jawa, Indonesia. The train network consists of block sections including unidirectional double-tracks and bidirectional single-tracks. There are some connections among trains because they use same rolling stocks. A mixed integer linear programming model is formulated to represent the problem. Main decision variables of the model are new departure and arrival times due to the disturbance. The objective function to be minimized is the total weighted delay. The model is examined using a hypothetical instance for four disturbance cases. Numerical experiments show that the model can represent the problem under study
Pendidikan Karakter berbasis Nilai-Nilai Konservasi Sosial melalui Pembelajaran Mata Kuliah bersama di Fakultas Ilmu Sosial Suprayogi, Suprayogi; Isdaryanto, Noorochmat; Lestari, Eta Yuni
Forum Ilmu Sosial Vol 44, No 2 (2017): December 2017
Publisher : Faculty of Social Science, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/fis.v44i2.12082

Abstract

Nilai-nilai konservasi sejalan dengan nilai-nilai Pancasila yang menjadi dasar negara Indonesia, akan tetapi pada kenyataannya nilai-nilai Pancasila dewasa ini mengalami degradasi, warga negara semakin lupa pada identitas bangsa, terjadi krisis jatidiri, merosotnya kepercayaan kepada pemerintah, masyarakat Indonesia tidak lagi mampu mengenali dirinya sebagai bangsa Indonesia, krisis ideologi, krisis karakter dan  krisis kepercayaan, sikap curiga dan meremehkan orang lain. Permasalahan klasik tentang krisis karakter semakin nampak jelas khususnya krisis karakter pada generasi muda, hal ini disebabkan karena pengaruh arus teknologi dan informasi. Maka dari permasalahan tersebut, pendidikan karakter bagi generasi muda sangat diperlukan untuk mengembalikan karakter yang sesuai dengan nilai-nilai Pancasila. Upaya penumbuhan karakter bagi generasi muda dapat dilakukan secara efektif melalui pembelajaran Mata Kuliah Bersama yang ada di Fakultas Ilmu Sosial dimulai dari perencanaan, pelaksanaan, dan evaluasi.
Optimalisasi Penetapan Embarkasi Haji dalam Rangka Efisiensi Biaya Penyelenggaraan Ibadah Haji (BPIH) Winda, Syahdu; Indriastuti, Dwi; Ferdinand, Julius; Suprayogi, Suprayogi
Integritas : Jurnal Antikorupsi Vol. 6 No. 2 (2020): INTEGRITAS: Jurnal Antikorupsi
Publisher : Komisi Pemberantasan Korupsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32697/integritas.v6i2.710

Abstract

Hajj pilgrimage cost (Biaya Penyelenggaraan Ibadah Haji/BPIH) requires around IDR 14 trillion every year. BPIH consists of direct and indirect costs, in which the largest cost component is the airfare reaching 86% of pilgrim deposits in 2019. This study shows that there is BPIH inefficiency that is caused by the disorganized appointment of the embarkation points and the division of flight groups that does not optimize aircraft capacity and airport capabilities. Through the operation research approach, this study models optimization BPIH by determining regional allocations of the pilgrims to embarkation points. The study aims to provide an alternative decision making for the Ministry of Religion in implementing an embarkation zoning policy so that BPIH becomes more efficient, transparent, and free from corruption.
Language use variation of L2 writers in weblog across different gender and genres Puspita, Dian; Suprayogi, Suprayogi
Rainbow : Journal of Literature, Linguistics and Culture Studies Vol 10 No 2 (2021): Rainbow: Journal of Literature, Linguistics and Culture Studies
Publisher : English Department, Faculty of Languages and Arts, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rainbow.v10i2.48936

Abstract

Despite the growing interest in investigating learners’ corpora, surprisingly little research has been conducted on the language use of L2 writers and its relation to the gender and genres in writing. Therefore, this study was aimed to find out the variation of language use in different genres or gender in weblogs, one of popular modes of computer-mediated communication (CMC). The study was done by conducting multivariate analysis using R program to weblog entries from a sample balanced of author gender (female or male) and weblog genre (diary or filter). Taking linguistic preferential features by Argamon et al (2003) and Pennebaker (2011) as dependent variables, the effect of genres or gender toward the use of the features was analyzed. The results showed that significant effects of several features can be considered as predictors. Personal pronouns and hedges (I think, and I believe) were found as predictors for diary; while the indefinite articles a/an and numbers were found as predictors for filter. As for the different language use by gender, female predictors were personal pronoun, verbs, negation, certainty words, and hedges. Meanwhile, the indefinite articles a/an, numbers, and preposition were the predictors of male writers.
PEMBINAAN NILAI TOLERANSI BERAGAMA DI PONDOK PESANTREN ANNURIYYAH SOKO TUNGGAL SEMARANG Jamaluddin, Eko Wahyu; Suprayogi, Suprayogi; Munandar, Aris
Unnes Civic Education Journal Vol 1 No 1 (2015)
Publisher : Civic Education Program, Universitas Negeri Semarang

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

Abstract

SokoTunggal Islamic Boarding School Semarang has a very important role as a place to nurture religious tolerance for its students. The need for religious tolerance education is urgent because various conflicts in Indonesia are sourced from inter-religious issues. Religious tolerance education in Soko Sole Boarding School aims at nurturing mental and morals of the students in order to become a person with ahlakul karimah showed by tolerance to differences in people’s lives, especially religious differences. The results suggest the pesantren sucesfully conducts such program because the background of the Kyai , who is very tolerant, and the vision, mission and purpose of boarding school to teach the value of tolerance. Religious tolerance value is fostered through the habituation of students in interaction with people of other religions, the example of Kyai, and through learning, especially the books of morals. The factors that asupport the development of tolerance in the boarding school include: the competence of management, and the high motivation of the students. While inhibiting factor is the caretaker and students who also have other jobs so they are not always able to follow the activities of the boarding school and the damage of some infrastructure.
Co-Authors A. Hakim Halim Ahmad S. Indrapriyatna Amelia Santoso Aris Munandar Aris Siswanto Avisenna, Hikmat Bermawi P. Iskandar Dian Puspita Dwi Arman Prasetya Dwi Indriastuti, Dwi Dwiwahju Sasongko E.F. Sri Maryani Santoso Eko Wahyu Jamaluddin, Eko Wahyu Endah Rahayu L. Ferdinand, Julius Firdausyi, Izzati Ardhan Hamonang Sigalingging, Hamonang Hery Ramdhani, Hery Hurmuzi, Erik Roma Ibnu Syabri Isdaryanto, Noorochmat Ismail, Khosid Mahendra Lestari, Eta Yuni Lisye Fitria Mochamad Verza, Mochamad Muhammad Syamsul Hadi, Muhammad Syamsul Nachrowie, Nachrowie Nimas Mayang sabrina, Nimas Mayang Nur Bahagia, Senator Nur Hidayat Nurdiansyah, Isnan One, Ferdyandika Putra Aprilia Paillin, Daniel Bunga Saragih, Nova Senator Nur Bahagia Sulistyawati Kumalasari, Sulistyawati Susy Susanty Thaddeus, Yudi Toha, Muhamad Valentine Valentine, Valentine Waskito, Arga Gladi Winda, Syahdu Yusuf Priyandari