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ASRO JOURNAL - STTAL
Published by Sekolah Tinggi Teknologi Angkatan Laut
ISSN : 24607037     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering
ASRO JOURNAL is bi-annual international referred journal with the objectives to explore, develop, and elucidate the knowledge of operation research, system analysis, logistic management, and policy & strategy to keep practitioners and researchers informed on current issues and best practices, as well as serving as a platform for the exchange of ideas, knowledge, and expertise among technology researchers and practitioners. ASRO (Analisis Sistem dan Riset Operasi) Journal provides an opportunity to share detailed insights from different understandings and practices associated with technology. It provides an international forum for cross-disciplinary exchange of insights and ideas regarding value and practices for dissemination. ASRO (Analisis Sistem dan Riset Operasi) Journal will publish your work to international society of practitioners and researchers with interest in technology and development from a wide variety of sectors.
Arjuna Subject : -
Articles 288 Documents
 7   8   9   10   11 
THE OPTIMIZATION OF MULTIPURPOSE BUILDING DEVELOPMENT ON PROJECT SCHEDULING USING PRECEDENCE DIAGRAM METHOD (PDM) Sutrisno Sutrisno; Ahmadi Ahmadi; Okol S Suharyo
JOURNAL ASRO Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (208.187 KB) | DOI: 10.37875/asro.v9i1.46

Abstract

ABSTRACT The current development of construction projects lead to construction projects being more complex and complicated. The success or failure of a project can be due to inadequate planning and less effective controls, resulting in inefficient projects. This will result in delays, lower quality, and increased implementation costs. All of those problems are expected to be overcome with Presedence diagram method by reducing the impact of delay and swelling of project cost by crashing with applied overtime. Acceleration of duration on the critical path jobs was performed. The results with PDM indicated that the optimal duration of project was 100 days with efficiency time for 20 days or equal to 16,67% and the total cost of Rp 13,060,754,232.00 with cost efficiency equal to Rp 528,158,094.00 or 3,88%. Keywords: Crashing, Controlling, Planning, PDM
THE EFFECTIVENESS ABSORPTION TEST OF LUBRICATING OIL WASTE AND HSD FUEL WITH NATURAL FIBERS (DURIAN SKIN) Abdul Rahman; Wawan Kusdiana; Ayip Rivai; Heru Hadi Suseno
JOURNAL ASRO Vol 10 No 3 (2019): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.744 KB) | DOI: 10.37875/asro.v10i3.144

Abstract

Pollution of sea water due to oil spills often occurs. Among them are tanker accidents, explosions of offshore oil platforms, ship operation errors and waste from the petroleum and coal industries. Oil spills in the sea often cause pollution which leads to damage to biological resources and damage to the underwater ecosystem. The purpose of this study was to determine the process and processing, and to determine the ability of durian skin to adsorb lubricating oil waste and HSD fuel. This research was conducted by processing the waste with variations of time 2, 5, and 10 minutes. And with variations in durian skin size of 0.25 mm², 1 mm², and 9 mm². With drying of durian skin between 1-15 days with 1-30 days. Then the results were analyzed to determine the efficiency of absorbing durian skin. The results of STTAL laboratory studies showed an increase in durian skin mass after undergoing a process of adsorption of lubricating oil waste and HSD fuel. Thus, the optimal durian skin time and size obtained on lubricating oil waste is 10 minutes with a surface area of 1 mm², mass of 4 grams in drying for 1-30 days. With efficiency of 82.54%. Whereas the HSD fuel is 10 minutes with a surface area of 0.25 mm², mass 4 grams on drying for 1-15 days. With an efficiency of 86.03%.Keywords: Durian skin, adsorption of lubricating oil waste, HSD
ANALYSIS OF DETERMINING CRITICAL COMPONENTS USING FMECA METHOD IN SEAWATER PUMP OF DIESEL GENERATOR CATERPILLAR 3412 Saiful Hasan; Erpan Sahiri; Suprayitno Suprayitno; Endin Tri Hartanto
JOURNAL ASRO Vol 10 No 3 (2019): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (525.09 KB) | DOI: 10.37875/asro.v10i3.170

Abstract

The seawater pump on the Caterpillar 3412 Diesel Generator is one of the important component to make the Diesel generator can work well. This section serves to circulate seawater for the heat transfer process. The seawater pump is part of a cooling system of the engine which keeps the engine temperature from being too overheat. Seawater pumps with continuous operational conditions, resulting in reduced component reliability. This study applies the FMECA method to identify opportunities for failure at the seawater pump. From the calculation of FMECA, it is obtained an assessment of the level of risk from a failure model that can give priority scale to preventive maintenance that can be done in the future. FMECA analysis of 27 components in seawater pump on the Diesel Generator, found 7 components that had RPN values above the average. The following are the 4 components with the highest RPN value, namely Shaft (7C-3493) RPN value 420,44; Key (175-6716) RPN value 300,31; Bearing Inner (4M-6107) RPN value 285 and Bearing Roller (3N-8463) RPN value 253,13. Components that have high RPN values require more attention, such as routine checks and periodic maintenance.Keyword: Seawater pump, Caterpillar 3412 Diesel Generator, FMECA, RPN.
MODEL PENGELOLAAN ALUR PELAYARAN SUNGAI BARITO DENGAN PENDEKATAN SISTIM DINAMIK Ahmadi Ahmadi; Farid Muldiyatno; Budisantoso Wirjodirdjo
JOURNAL ASRO Vol 5 (2016): Jurnal Analisis Sistem & Riset Operasi
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1063.717 KB)

Abstract

Sungai merupakan salah satu infrastruktur alami untuk sarana transportasi. Kendala dalam pemanfaatanya adalah sedimentasi perairan muara. Untuk menjadikan alur sungai aman dalam bernavigasi, dilakukan pengelolaan dengan menjaga kedalaman, pemasangan sarana bantu navigasi pelayaran, dan pembuatan peta kedalaman. Alur Barito adalah satu-satunya alur yang telah dikelola dan dijadikan sebagai alur berbayar. Pemodelan sistim dinamik digunakan, untuk meneliti apakah pengelolaan alur Barito merupakan suatu yang berkelanjutan secara operasional dan sosial. Dengan memasukan data biaya perawatan alur, cadangan dan produksi batubara, pendapatan daerah dan jumlah kapal yang masuk, dapat disimulasikan apakah pengelolaanya berkelanjutan. Hasil simulasi menunjukan, pertumbuhan perekonomian meningkat, pengelolaan alur dapat dilaksanakam sampai dengan 33 tahun kedepan dimana pada waktu itu, cadangan batubara sebesar 3,6 milyar ton dari tahun 2008 akan habis. Skenario kebijakan untuk mempertahankan pendapatan fee chanel adalah menentukan barang dagang lain yang diangkut melalui Barito untuk dikenai tarif.
ANALISA PEMILIHAN TIPE KAPAL PATROLI DI PERAIRAN INDONESIA DENGAN INTEGRASI METODE LIFE CYCLE COST DAN MCDM Okol Sri Suharyo; Ahmadi Ahmadi; Didik W. Cahyono
JOURNAL ASRO Vol 7 (2017): Jurnal Analisis Sistem & Riset Operasi
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1041.007 KB)

Abstract

KRI Satrol Koarmabar (Satuan Kapal Patroli Armada Barat) adalah Satuan dari unsur KRI terkecil dari TNI AL yang mempunyai tugas untuk melaksanakan pengamanan/patroli wilayah perairan Indonesia terdekat dengan garis pantai di wilayah Indonesia bagian barat. Karena itu sangat diperlukan spesifikasi kapal patroli yang paling sesuai/mampu untuk melaksanakan tugas tersebut dihadapkan dengan kerawanan/pelanggaran yang sering terjadi, serta kondisi geogafis Indonesia yang terdiri dari ribuan pulau dan selat dangkal, dan juga dihadapkan dengan kondisi anggaran pertahanan negara yang terbatas. Pada penelitian ini mengusulkan penggunaan integrasi metode LCC dan MCDM dalam pemilihan tipe Kapal Patroli di perairan Indonesia wilayah barat. Metode LCC digunakan untuk menghitung biaya keseluruhan daur hidup kapal patroli. Metode MCDM disini menggunakan DEMATEL-ANP-TOPSIS. Metode DEMATEL digunakan untuk menganalisa hubungan antara kriteria terkait yang dipertimbangkan dalam penelitian ini, metode ANP untuk mengevaluasi data kualitatif dan menentukan bobot masingmasing criteria. Metode TOPSIS digunakan untuk melakukan perangkingan alternatif, dengan memasukan bobot yang didapat dari ANP dengan nilai LCC dan spesifikasi teknis kapal patroli. Berdasarkan penelitian ini menyimpulkan bahwa dari alternatif yang ada, Kapal Patroli terbaik yang semestinya dapat dipilih untuk pengembangan/pengadaan KRI Satrol Koarmabar adalah KRI Aluminium Class dengan nilai 0,6073, selanjutnya adalah KRI Baja Class dengan nilai 0,5931 dan terakhir adalah KRI Fiber Class dengan nilai 0,3885. Hasil dari penelitian ini diharapkan dapat menjadi bahan masukan dan pertimbangan para Pimpinan TNI AL di dalam pengembangan KRI Satrol dimasa mendatang.
THE APPLICATION OF PROMETHEE AND BORDA METHODS FOR SELECTING BUSINESS LOCATION Sutikno Wahyu Hidayat; I Nengah Putra A; Ike Agustiyani; Adi Bandono
JOURNAL ASRO Vol 10 No 2 (2019): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (261.675 KB) | DOI: 10.37875/asro.v10i2.126

Abstract

The development of a franchise business requires the opening of new branches to be able to expand the wider market in the community. The selection of a franchise's new location is a very decisive factor in the success of the franchise in the future. With the new location allows to increase the range, market and number of consumers. The object of research in this case is a retail franchise. The PROMETHEE method is used to manage individual decisions of each decision maker, while the Borda method is used to manage group decisions on the results of the PROMETHEE method ranking. The use of these two methods is one solution to produce more objective group decisions. Alternative ranking of this location is in accordance with the rules and policies and procedures for opening a new branch of a retail franchise. The variables in this study are facilities and infrastructure, crime, per capita income, economic growth, population and the number of retail franchises around the alternative location for opening the retail franchise branch. The results obtained from this study are location E or Endrosono area as the best alternative location.
A MODEL SERVPERF IN SURGICAL TREATMENT SERVICES FOR “BPJS” NON ARMY PATIENTS AT THE NAVAL HOSPITAL DR. RAMELAN SURABAYA Agusta Murphy Tarigan; Agus Subianto; Sudibyo Sudibyo; Lunariana Lubis
JOURNAL ASRO Vol 10 No 2 (2019): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.484 KB) | DOI: 10.37875/asro.v10i2.132

Abstract

This article discusses national health insurance-based medical services for the community in patient surgery for Social Security Administrator Board (BPJS) non army at the Naval Hospital Dr. Ramelan in Surabaya. The main problem is whether Tangibles factors; Reliability; Responsiveness; Assurance; Empathy; Expertise; Outcome contributed to the surgical treatment of “BPJS” non army patients at the Naval Hospital Dr. Ramelan. The main focus of this analysis is the use of SERVPERF's Services Quality Model to analyze the factors that support and hinder the service of surgery for “BPJS” non army patients at the Naval Hospital Dr. Ramelan. The research was carried out in a descriptive case-based quantitative study with in-depth interview, documentation and questionnaire techniques, to assess service quality class intervals based is used on the mean and standard deviation. The results of the study show that surgical treatment services in 2015-2016 found a tendency of the increasing number of surgery mainly on major surgery and special surgery, because hospitals can respond to public trust in the sense that medical service employees are able to implement excellent services for “BPJS” non army patients so that patients are satisfied with services provided. The findings that still need to be improved are the Assurance factor in line with the development of science and technology as an effort to increase the competitiveness of human resources and the availability of facilities equivalent to international hospitals. Keywords: SERVPERF model, “BPJS” Non Army, Surgical Treatment Services
OPTIMIZATION OF B-SERIES PROPELLER DESIGN AS KCR 60 PROPULSOR TO ACHIEVE OPTIMAL PERFORMANCE USING MATHEMATICAL MODEL Akhmat Nuryadin; Abdul Rahman; Cahyanto Cahyanto
JOURNAL ASRO Vol 10 No 3 (2019): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.782 KB) | DOI: 10.37875/asro.v10i3.163

Abstract

The process of designing a propeller as a ship propulsor is an important step to produce a propeller that has the ability to achieve the desired target speed of the ship. Propeller optimization is an effort to produce a propeller design with optimal capabilities. This propeller design uses a B-series propeller where this propeller is commonly used as ship propulsor. Optimization steps to find the optimal propeller, namely: determining the objective function, determining the decision variable, and determining the constraint variable. The objective function of this optimization is to determine the Advanced-optimal (J-opt) coefficient value for the propeller. The J-opt coefficient must have a value greater than the J-Design coefficient (J-d) value and the smallest possible value (minimization function). For decision variables include picth diameter ratio (P / D) and Blade area ratio (Ae / Ao) and number of leaves (Z). While the constraint variables are: the pitch diameter ratio value of the B-series propeller (0.5≤P/D≤1.4), the blade area ratio B-series (0.3≤Ae/Ao≤1, 05) as well as the number of blade (2≤Z≤7). From the calculation results of the optimization of the B-series propeller design for the KCR 60, the optimum value is different for each blade. the propeller with the number of blade 2 (Z = 2) obtained the optimum propeller with the value of J-opt =0.77098733, Ae/Ao=0.3, P/D=1.13162337, KT = 0.165632781, 10KQ=0, 27546033 and efficiency=0.73198988. Popeller with number of blades 3 (Z=3) obtained optimum propeller with J-opt value=0.77755594, Ae/Ao=0.3, P/D=1.06370107, KT=0.168069763, 10KQ=0.28984068 and efficiency=0.70590799. Propeller with number of blades 4 (Z=4) obtained optimum propeller with J-opt value=0.78478688, Ae/Ao=0.45954773, P/D=1.03798312, Kt=0.172147709, 10Kq= 0.3091063 and efficiency=0.67797119. Propeller with blades number 5(Z=5) obtained optimum propeller with J-opt value=0.78575616, Ae/Ao=0.65607164, P/D=1.02716571, KT=0.174099168, 10KQ=0.31376705 and efficiency=0.67547177. Propeller with blades number 6 (z=6) obtained optimum propeller with J-opt value=0.78867357, Ae/Ao=0.71124343, P/D=1.0185055, KT=0.176525247, 10KQ=0.32215257 and efficiency =0.66705719. Propeller with number of blades 7 (Z=7) obtained optimum propeller with J-opt value=0.7949898, Ae/Ao=0.69772623, P/D=1.01780081, KT=0.181054792, KQ=0.34011349 , and efficiency =0.64804328.Keywords : KCR, Optimization,Wageningen B-series.
PEMILIHAN RUDAL PERMUKAAN KE PERMUKAAN PADA KRI KELAS SAMPARI DENGAN MENGGUNAKAN METODE DECISION MAKING TRIAL AND EVALUATION LABORATORY (DEMATEL) DAN ANALYTYC NETWORK PROCESS (ANP) Ahmadi Ahmadi; Udisubakti Cipto Mulyono; Joni Hari Purnomo
JOURNAL ASRO Vol 4 (2015): Jurnal Analisis Sistem & Riset Operasi
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (843.334 KB)

Abstract

KRI merupakan salah satu Alat Utama Sistem Senjata (alutsista) yang dimiliki oleh TNI AL. Dalam pengadaanya di tahun 2014 ini, TNI AL membuat sebuah kapal jenis Kapal Cepat Rudal (KCR) buatan PT PAL yang memliki beberapa kelebihan baik dari platform maupun sewaco jika dibandingkan dengan KRI lainnya,yang diberi nama KRI Kelas Sampari.Untuk mendukung dalam kemampuan bertempurnya, KRI Kelas Sampari ini akan dilengkapi oleh senjata rudal atas air (Surface to Surface Missile/SSM) untuk meningkatkan fungsi asasi sebagai Kapal perang yang maksimal. Untuk dapat menjalankan fungsinya dengan baik, maka diperlukan pemilihan alternatif senjata rudal atas air yang benar-benar tepat. Pemilihan alternatif senjata rudal atas air memerlukan analisa terhadap informasi dan identifikasi berbagai persyaratan yang penting mengenai data-data dari alternatif senjata atas air. Selain alternatif, nantinya diharapkan akan diketahui juga kriteria-kriteria utama dalam pemilihan Senjata atas air tersebut. Dalam pengambilan keputusan pengadaan Senjata Atas Air, dimana permasalahan yang ada tidak dapat disusun dalam bentuk hirarki karena melibatkan interaksi dan dependensi elemen-elemen yang lebih tinggi tingkatannya terhadap elemen yang lebih rendah levelnya. Maka dari itu pada penelitian ini digunakan metode Dematel dan Analytic Network Process (ANP) yang mempunyai kemampuan mengakomodasi keterkaitan antar kriteria atau alternatif.
APLIKASI FAILURE MODE EFFECT AND CRITICALITY ANALYSIS (FMECA) DALAM PENENTUAN INTERVAL WAKTU PENGGANTIAN KOMPONEN KRITIS RADAR JRC JMA 5310 PADA KRI SATUAN KAPAL PATROLI KOARMATIM Ahmadi Ahmadi; Udisubakti Ciptomulyono; Endin Tri Hartanto
JOURNAL ASRO Vol 6 (2016): Jurnal Analisis Sistem & Riset Operasi
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (776.804 KB)

Abstract

Penggunaan radar navigasi di KRI, khusus nya di Satuan Kapal Patroli Koarmatim sangat vital sebagai alat indera jarak jauh dalam bernavigasi. Penggunaannya mutlak harus ada pada saat KRI melaksanakan operasi, sehingga kondisi kesiapan radar navigasi akan sangat mempengaruhi pelaksanaan tugas operasi yang diemban oleh Unsur-Unsur tersebut. Diperlukan manajemen pemeliharaan yang baik dan terencana untuk memperbaiki atau meniadakan kerusakan agar kinerja sistem tidak menurun. Failure Mode Effect and Criticality Analysis (FMECA) digunakan sebagai sebuah metodologi untuk mengidentifikasi dan menganalisis semua mode kegagalan potensial dari berbagai bagian sistem, efek kegagalan tersebut terhadap sistem, bagaimana menghindari kegagalan dan atau mengurangi dampak dari kegagalan pada sistem. Pada tulisan ini diusulkan model FMECA dalam menentukan komponen kritis Radar Navigasi JRC JMA 5310. Berdasarkan model FMECA tersebut didapat Risk Priority Number (RPN) yang dijadikan nilai acuan dalam penentuan komponen kritis. Nilai RPN setiap komponen yang didapat dianalisa dengan Risk Matrix, dari 27 (dua puluh tujuh) komponen yang telah diidentifikasi, didapat 7 (tujuh) komponen yang dianggap kritis, yaitu Modulator, Power Supply Scanner, Dioda Limiter, Magnetron, Receiver, Motor, Circulator. Komponen Modulator memiliki nilai RPN tertinggi dengan nilai 24180 dan komponen Plotter Control Circuit memiliki nilai RPN terendah dengan nilai 3289. Penentuan interval waktu penggantian komponen kritis yang telah didapat menggunakan pendekatan Reliability dan Cost Benefit Ratio (CBR). Didapatkan hasil bahwa komponen Dioda Limiter memiliki waktu penggantian tercepat, yaitu 152 hari. Sedangkan komponen dengan waktu penggantian terlama, yaitu 458 hari adalah komponen Motor dan Circulator. Di dapat pula nilai CBR untuk semua komponen kritis kurang dari 1 (CBR <1) menunjukkan biaya penggantian yang direkomendasikan sudah efisien. Komponen Dioda Limiter memiliki nilai CBR paling efisien, yaitu 0,57572. Dari analisa sensitivitas diperoleh variabel Reliability R(t) sangat berpengaruh terhadap perubahan penentuan interval waktu penggantian komponen kritis, dimana didalamnya terdapat parameter β (slope), parameter Ƴ (location), dan parameter Ƞ (scale). Parameter β lebih berpengaruh terhadap perubahan nilai Reliability R(t).

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