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All Journal Jurnal Teknik Industri Jurnal Teknik ITS IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Jurnal technoscientia REKAYASA Jurnal Teknobisnis Hasanuddin Economics and Business Review Network Engineering Research Operation [NERO] Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri ASRO JOURNAL - STTAL STTAL POSTGRADUATE - INTERNATIONAL CONFERENCE IJEBD (International Journal Of Entrepreneurship And Business Development) Bisma: Jurnal Bisnis dan Manajemen Business and Finance Journal Matrik : Jurnal Manajemen dan Teknik Industri Produksi JURNAL TEKNOLOGI TECHNOSCIENTIA Economics and Digital Business Review Interdisciplinary Social Studies Journal Research of Social Science, Economics, and Management IJESPG (International Journal of Engineering, Economic, Social Politic and Government) journal Sewagati El-Mal: Jurnal Kajian Ekonomi & Bisnis Islam Journal of Ekonomics, Finance, and Management Studies

Udisubakti Ciptomulyono

Departemen Teknik Dan Sistem Industri Institut Teknologi Sepuluh Nopember

Author-ID : 247884

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Development of Hesitant Fuzzy-Based Project Selection Method with Consideration of Benefits, Opportunities, Costs and Risks Karina Ayu Trijana; Udisubakti Ciptomulyono
IPTEK Journal of Proceedings Series No 1 (2020): The 1st International Conference on Business and Engineering Management (IConBEM)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2020i1.11328

PT X, a power generation company, hasn’t been able to meet their target in the business development segment over the past few years. This is due to a problem detected in their Project Portfolio Management, in which PT X’s project selection method hasn’t considered the ambiguity nature of project’s information and risks. This study is going to develop a project selection method for PT X using MCDM (multi criteria decision making) with BOCR (benefit, opportunity, cost, risk) Concept to evaluate many criteria that need to be considered by the company, especially conflicting criteria such as benefit with cost and opportunity with risk. Not only that, hesitant fuzzy will be used because project itself has many uncertain or ambiguous information, so stakeholder will face difficulties in determining the value for the evaluation. From the integration of those things in this study, it is found that for PT X, Benefit has the biggest priority, followed by Opportunity, Risk, and Cost in Project Selection for PT X. It is also found that based on additive-BOCR, Project C gives the optimal value for PT X, followed by Project B, Project A, Project D, dan Project E.

A Combined AHP-GP for Maintenance Project Selection in Coal Power Plant Hery Setiyawan; Udisubakti Ciptomulyono
IPTEK Journal of Proceedings Series No 3 (2020): International Conference on Management of Technology, Innovation, and Project (MOTIP) 2
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2020i3.11232

A proper maintenance project selection is a key to support performance of power plant. The issue of maintenance is allocation a limited budget to achieve the goals of various maintenance criteria and conflicting objectives. This paper presents an integrated AHP and goal programming. In the first step, since maintenance is measured in qualitative criteria, it is recommended to use AHP to weight and quantify criteria. Second step utilize GP which uses the criteria weights and alternative priorities calculated with AHP to optimize multiple objectives without exceeding available resource constraint. The results show that the approach can aid in selection optimal projects within available budget.

Analysis of Ergonomics Risk Factors and Manual Material Handling Assessing Alternative Using Cost Benefit Methods Eko Nurmianto; Udisubakti Ciptomulyono
IPTEK Journal of Proceedings Series Vol 1, No 1 (2014): International Seminar on Applied Technology, Science, and Arts (APTECS) 2013
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2014i1.399

This research to analyze the factors that cause risks of low back pain (L5/S1) on Manual Material Handling activities at raw material warehouse and finished goods warehouse. Objective is to determine the factors that cause low back pain (L5/S1), analyze the proposed improvement work system alternative with benefit cost ratio (B/C). The importance of cost-benefits analysis of ergonomics interventions has been emphasized (Tompa et al., 2009; Rivilis et al., 2008). Methodology by observing MMH working system, and distributing job discomfort survey. For the quantitative calculation used RWL, LI and Chaffin’s Model. The model of analysis shows the factor effected to RWL and LI is variable V (vertical distance), D (distance movement), and L (heavy of load). Examples of alternatives proposed : (1) addition of scissor of lift trolleys, (2) addition in amount of workers and (3) modifying of lifting method. Alternative whose the B/C value ≥ 1 are feasible economically to be used. Top management needs a cost-benefit analysis proving the positive outcomes. This economics evaluation showed that ergonomic intervention justifies the costs of the implementation, leading to positive outcomes.

Integrated Fuzzy AHP and Weighted-Fuzzy Goal Programming Approach to Solve Supplier Selection Problem with Subjective Factors Annas S. Setiyoko; Udisubakti Ciptomulyono; I. K. Gunarta
IPTEK The Journal for Technology and Science Vol 18, No 1 (2007)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v18i1.181

Fuzzy goal programming (FGP) method used in supplier selection process shows that decision maker preferences on each fuzzy goal are not yet considered. In order to accommodate those preferences, that are stated as weight on each fuzzy goal, and called weighted fuzzy goal programming (WFGP) method. Then, the developed method is utilized to solve international supplier selection problem. There would be 4 objective functions developed i.e. to minimize net cost, to minimize late delivery, to minimize net rejected material, as well as to maximize business relationship. Maximization of business relationship objective function is intended to obtain right suppliers related to it score. Those objective functions are optimized subject to total demand, maximum supplier capacity, total purchasing cost based on owner estimate, and minimum order requested by suppliers. Linguistic variables are used to measure criterions in business relationship factor. To do so, fuzzy analytic hierarchy process (FAHP) transforms that qualitative manner in linguistic variables to numerical number as a constant in business relationship objective function. Those proposed method provides enhanced solution that represent decision maker preferences than FGP. That is exhibited with equal relationship between weighted goals value and the output of those weighted goals.

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.

THE OPERATIONAL READINESS FOR ANTI SUBMARINE INDONESIAN NAVAL BY USING ANTI SUBMARINE HELICOPTER Muksin Muksin; Udisubakti Ciptomulyono; Sutrisno Sutrisno; Sunarta Sunarta
JOURNAL ASRO Vol 12 No 01 (2021): 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 | DOI: 10.37875/asro.v12i01.394

Some of the Indonesian naval effort to see and protect the Indonesian territory is by using Helicopter sea patrol. In the other side, submarines are the most strategic weapons in the world that can provide a deterrence effect which has a very significant impact on the maritime powers of the countries operating them in the era of generation 4.0 war. Operational readiness is very important, there are readiness in building operational readiness for naval defense through budget fulfillment, utilization of existing resources, procurement and naval modernization by paying attention to Life Cycle Cost, and interoperability while still paying attention to paradigm shifts in naval capability. So, the combat readiness is the condition of the Indonesian Navy's defense equipment and its constituent units, resources and personnel, weapon systems and other military technology equipment in a condition that is ready to carry out military operations in an unspecified time, or function consistent with the purpose for which the defense equipment is organized or designed, the management of resources and training personnel in preparation for combat in the face of the threat of modern warfare in a state of constant combat readiness. At this time, training in Anti-Submarine Warfare conducted by Indonesian Navy’s Helicopter is still limited to carrying out flight procedures, communication procedures with the KRI and the command line, because Helicopters have sensors, weapons and command that need to be upgraded and The personnel also have underwater warfare capabilities that need to be upgraded, so there needs to be an increase in the capability of the helicopter and human resources. Technometry will be used to calculate the Heli's current readiness level. Keywords: Submarine, Anti Submarine Helicopter and operational readiness

PENJADWALAN PENUGASAN KRI DI KOLINLAMIL DENGAN PENDEKATAN BINARY INTEGER PROGRAMMING Ahmadi Ahmadi; Udisubakti Ciptomulyono; Mohamad Solekhan
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 (592.248 KB)

Penjadwalan adalah suatu aktivitas penugasan yang berhubungan dengan sejumlah kendala, sejumlah kejadian yang dapat terjadi pada suatu periode waktu dan tempat atau lokasi sehingga fungsi objektif sedekat mungkin dapat terpenuhi. Dalam hierarki pengambilan keputusan, penjadwalan merupakan langkah terakhir sebelum dimulainya suatu operasi. Penjadwalan penugasan KRI di Kolinlamil menjadi topik yang menarik untuk dibahas dan dicari penyelesaiannya dengan metode matematis. Proses penjadwalan penugasan KRI di Kolinlamil dilakukan untuk menghasilkan jop/jog tahunan. Proses ini tidak hanya memerlukan tindak lanjut yang cepat, akan tetapi juga memerlukan langkah-langkah yang sistematis. Penjadwalan penugasan yang diterapkan Kolinlamil saat ini dilakukan oleh personel dengan tidak menggunakan perhitungan matematis. Proses penjadwalan penugasan kapal dalam penelitian ini dilakukan dengan menggunakan pendekatan metode Binary Integer Programming (BIP) dengan tujuan untuk meminimalkan penalty apabila melanggar soft constrain. Penjadwalan yang diamati adalah 14 kapal melaksanakan 26 operasi selama 52 minggu (1 tahun). Penelitian ini dimulai dengan penentuan variabel keputusan penjadwalan serta batasan yang dihadapai. Batasan itu yaitu hard constrain: kapal mulai operasi untuk tiap jenis operasi, kelas kapal yang dibolehkan melaksanakan operasi, durasi tiap operasi, jumlah kapal tiap operasi, jam putar maksimum yang di ijinkan, serta soft constrain: lama kapal operasi secara berturut-turut. Formulasi matematis dari model BIP yang dibuat terdiri dari tiga parameter ukur, empat variabel keputusan, satu fungsi tujuan dan tujuh fungsi kendala. Kemudian dilakukan pengembangan model BIP yang selanjutnya diselesaikan komputasi menggunakan LINGO 11.0. Hasil yang didapatkan bahwa model BIP yang diterapkan pada penjadwalan penugasan KRI Kolinlamil bisa mendapatkan hasil yang optimal. BIP adalah suatu metode yang tepat untuk digunakan sebagai metode dalam penjadwalan penugasan KRI di Kolnlamil.

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)

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).

AHP-COPRAS Model for Determination of Suitability of Surveyor Assignment for Survey of New Building Ships at PT. BKI Main Branch Surabaya Bakti Nugroho Dwi Kushadianto; Udisubakti Ciptomulyono
IJEBD (International Journal of Entrepreneurship and Business Development) Vol 5 No 3 (2022): May 2022
Publisher : LPPM of NAROTAMA UNIVERSITY

Purpose: The purpose of this study is to (1) identify the criteria used as the basis for selecting surveyors who will conduct a survey of new building ships at new shipbuilding yards in East Java, (2) develop a measurement of the level of conformity of surveyors to survey activities of new building ships at new shipbuilding yards in East Java, and (3) provide recommendations for the assignment of surveyors who handle surveys of new building ships at new shipbuilding yards in East Java. Design/methodology/approach: The model used in this study is the AHP–COPRAS model, which is combined to select surveyors who will survey a new shipbuilding yard. First, the results of AHP processing will be separated for each shipyard class to know each shipyard's criteria and alternative weights. The next stage is an analysis using COPRAS. The questionnaire used to collect COPRAS data uses an ordinal scale. Respondents who will be involved in filling out the COPRAS questionnaire are surveyors at BKI Main Branch Surabaya. Next, COPRAS assesses each surveyor using the criteria and alternatives identified in the AHP process. Calculations on COPRAS also use the weights that have been generated from the AHP. At the final stage, different scores will be obtained for each surveyor for each class of shipyard under study. Findings: The highest utility value in Shipyard 1 was found in JX surveyors with a utility of 100%. Thus, at shipyard 1 the JX surveyor is the surveyor who is considered the most suitable to survey building ships at PT. BKI Main Branch Surabaya. The highest utility value in Shipyard 2 is found in surveyor AX with a utility of 100%. Thus, at Shipyard 2, the AX surveyor is the surveyor who is considered the most suitable for surveying shipbuilding at PT. BKI Main Branch Surabaya. The highest utility value at Shipyard 3 is found in JX surveyors with a utility of 100%. Thus, at Shipyard 3 the JX surveyor is the surveyor who is considered the most suitable to conduct a shipbuilding survey at PT. BKI Main Branch Surabaya. Paper type: Research paper

Suitability of Assignment Surveyors in Ship Periodic Survey Activities of PT. BKI Main Branch Surabaya Class Using the AHP-Copras Model Lutfi Paliam Paraya; Udisubakti Ciptomulyono; Arief Nurtjahjo
IJEBD (International Journal of Entrepreneurship and Business Development) Vol 5 No 3 (2022): May 2022
Publisher : LPPM of NAROTAMA UNIVERSITY

Purpose: The purpose of this study is to analyze the criteria that can be used to select surveyors who will conduct periodic surveys of ships, analyze the level of surveyors on periodic ship survey activities at BKI Main Klas Surabaya Branch, and provide recommendations to BKI regarding the needs of surveyors who conduct periodic surveys of ships at BKI Branch. Main Surabaya Class. Design/methodology/approach: The model used in this study is the AHP – COPRAS model which is combined in selecting surveyors who will conduct periodic surveys. There are three levels in the AHP chart, namely objectives, criteria, and alternatives. The AHP chart aims to find suppliers that match field conditions and needs. The results of AHP processing are separated for each class of company ship so that the criteria and alternatives for each company can be known. The next stage is an analysis using COPRAS. This method is used to provide an assessment of each surveyor using the criteria and alternatives that have been identified in the AHP process. Calculations on COPRAS also use the weights generated from the AHP. In the final stage, different scores are obtained for each surveyor for each class of company served. Findings: There are five categories of ships studied, namely General Cargo Ship, Oil Tanker Ship, Offshore Service Vessel, Container Ship, and Passenger Ship. Experience in the maritime industry and experience carrying out survey activities are the most important criteria in selecting surveyors for all types of ships. Next is networking and track record alternately ranking second and third. Training and discussion became the last criteria that were considered important by the respondents. MN is the surveyor who gets the highest utility score for all types of surveys. This shows that the MN surveyor is the most suitable for all types of surveys available. AC and TB surveyors have ranked second and third alternately for the magnitude of utility value. Followed by other surveyors. Recommendations that can be given to companies regarding the assignment of surveyors who handle periodic surveys of ships at shipping companies in East Java are: The company already has criteria for the selection of surveyors, but the company can use the utility value generated from this study as consideration for selecting surveyors, and the company needs to evaluate the surveyor selection process that has been implemented in the company. Paper type: Research paper

Co-Authors Achmad Danu Firdaus AHMADI Ahmadi Ahmadi Akhmad Mulyadi Amarulla Octavian Annas S. Setiyoko Arief Nurtjahjo Arino Anzip Aritonang, Adhe Martha Veronika Bakti Nugroho Dwi Kushadianto Budianto, Akhmad David Artanto Dewi, Sri Rachmi Nadhifah Didik Wahyu Cahyono Dinariyana, Anak Agung Bagus Dwi Asmoro, Nurcahya Effi Latiffianti Eko Nurmianto Eko Nurmianto Endin Tri Hartanto Fodyansa, Aldo Fuad Achmadi Gogor Arif Handiwibowo Hakim, Muhammad Saiful Handaningtyas, Inggrid Handiwibowo, Gogor Arif Hanoraga, Tony Hartanto, Endin Tri Hendrixon Hatta Hendriyadi, Hendriyadi Herlina Herlina Herry, Herry Herwindo, Raden Denny Hery Setiyawan I. K. Gunarta Iwan Hendra Susilo Izzat Aulia Akbar Jani Rahardjo Jani Rahardjo Karina Ayu Trijana kusdiana, wawan Kusumaningrum, Ajeng Wardhani Lutfi Paliam Paraya M. Fatkhur Rohman Maghfur Rozudin Ozie Maranatha Wijayaningtyas Marcus Tukan Mohamad Solekhan Mohamad Yusak Anshori Mokh. Suef Moses Laksono Singgih Muhammad Ainul Fahmi Muksin Muksin Nabila, Debby Dea Nabila, Niken Salma Naifah, Sonia Ratnaduhita Nurani Ninditya Nareswari Novitasari, Dyah Nurdiansyah, Ervin Prakosa, Galih Arief Pritantyo, Firgha Ali Putra, I Nengah Putra, Riyan Afnanda Putu Dana Karningsih Rahmaningtyas, Ivana Rashida, Ailsa Dahayu Ridwan Taofiq Firdaus Rindi Kusumawardani, Rindi Rubiyantoro Murniawan Rut Dea Monica S Suharyo, Okol Safrudin, Muhammad Nur Salsabila, Disya Berliani Satria Fadil Persada Savitri, Niken Anggraini Septin Puji Astuti Setyani, Kartika Sjarief Wijaya Soehardjoepri Soehardjoepri Solekhan, Mohamad Sri Rachmi Nadhifah Dewi Srihandoko, Koko Stefanus Eko Wiratno Suef, Mokhammad Sunarta Sunarta Surono, Adi Susilo, Ferdy Hendarto Sutrisno Sutrisno Sutrisno, Sutrisno Suwarno, Panji Tri Achmadi Trika Pitana Valmay, Altelah Anisa Wiscahyo, Gelar Witantyo Witantyo Wiwin Widiasih Yani, Beta Fitri Yudha Prasetyawan Zahra Nurkarima Budiwati Attori

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