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ASRO JOURNAL - STTAL
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.
Articles
46
Articles

Armansyah, D, Sukoco, N B, Pranowo, W S

ASRO JOURNAL - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Institute of Technology - STTAL

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Abstract

ABSTRACT Sonic Layer Depth is the vertical distance from surface to the depth where the speed of sound reach it’s local maximum. Global Navy as well as Indonesan Navy operates in this kind of layers on a daily basis, wether it be in an anti submarine warfare operation through its ships and aircrafts or in an anti-surface warfare operation waged by its submarines. For the navy, the importance of knowing the exact value of the SLD is because it determines the minimum cut off frequency and sound wave propagation above which sound tends to be trapped and below which a shadow zone exist. This has a direct impact on where the navy operates its sensors and places its platforms in the water column. The best way to estimate SLD is by performing own measurement on the ocean using instrument such as expendable bathytermographs, which can be relatively expensive and time consuming for an operational navy ships, furthermore such measurement may be impractical in the case of mission planning or emergencies. Dedicated oceanography survey for the purpose of science and defense is relatively scarce due to prioritization concerning to the budget available resulting lack of time series in situ CTD observation which cover full annual cycle variation in Indonesia waters. Banda Indonesia Through Flow Dynamic Experiment (BIDE) is multi institution and bilateral oceanography experiment led by Indonesian scientist which utilizes argo float to perform in situ CTD measurement in Banda Sea to get an adequate time series data that cover full annual cycle variation. The dataset is publicly available so defense community as well may utilize the data for defense interest such as sonic layer depth variation analysis in Banda Sea.   Keyword : sonic layer depth, BIDE, argo float, undersea warfare, tactical environment

Herlambang, Teguh, Subchan, Subchan

ASRO JOURNAL - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Institute of Technology - STTAL

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Abstract

ABSTRACT This paper is about designing motion control system with 2-DOF motion equation to be applied to an Autonomous Underwater Vehicle (AUV) system. The 2-DOF motion equation which consists of surge and roll motion in the form of equations of nonlinear motion. The control system design applied to the ITSUNUSA AUV system uses the Proportional Integral Derivative (PID) method. The simulation results of the PID control system with the motion equation with 2-DOF on the ITSUNUSA AUV system show that the system proves to be stable at a predetermined set-point with an error of 0.01% for surge motion and that with an error of 4.2% for roll motion.  Keywords: AUV, motion control, PID

Setiawan, Wisono, S Suharyo, Okol

ASRO JOURNAL - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Institute of Technology - STTAL

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Abstract

ABSTRACT Indonesian Navy as a marine security defense force has an Integrated Armored Weapon System (SSAT), one of them is the power of Submarine and the amount of it will continue to evolve. The current condition demands to perform a development and review of strategic and optimal submarine training areas to support the exercise and preparedness of the submarines strength to prepare the readiness of combatcondition. The purpose of this study was to determine the best criteria for the location of the submarine training by analyzing and reviewing some of the existing locations of Navy Submarine Exercise practice and doing a further development. In the selection of submarine training criteria, the method used was Fuzzy Multiple Decision Making Criteria (FMCDM). The result of the criteria weight assessment had been re-verified by the experts with 90% agree, 5% strongly agree and 5% disagree.  Keywords: Determination Criteria,Training Location, Submarine, Fuzzy MCDM

Ilhamsah, Ilhamsah, Cahyadi, Cahyadi, Yulianto, Yulianto

ASRO JOURNAL - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Institute of Technology - STTAL

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Abstract

ABSTRACT The scheduling of production floor is a sophisticated problem which seeks the optimal task  allocation to certain resources under a number of constraints.The use of optimization techniques facilitates the determination of acceptable solutions that considered optimized for a specific problem. This paper proposes production scheduling solution based on job priority in a Non-Deterministic Polynomial-time hard (NP-hard) problem. The case study was taken from the Spirit Aerosystem Project, particularly in the Inboard Outer Fixed Leading Egde - Drive Rib 1 component production process. The problem consists of finding the machine operations schedule, taking into account the precedence constraints. The main objective is to minimize total delays or tardiness. The genetic algorithm was employed to determine the optimized production scheduling solution. The parameter for genetic operators in this study consists of a roulette wheel selection, 1 elitist chromosome, partially-mapped crossover mutation and 1 point mutation. The termination condition was achieved when there has been no improvement in the population for 30 iterations.The results show that the algorithm is capable to generate optimum production schedule with minimum tardiness for the given problem.  Keywords: Genetic algorithm, job shop problem, scheduling problem

Suprihatin, Endang

ASRO JOURNAL - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Institute of Technology - STTAL

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Abstract

ABSTRACT University of 17 Agustus 1945 or UNTAG Banyuwangi is a private university, where the source of mostly income comes from students or in other words that all forms of activities carried out are geared towards students, therefore efforts to acquire new students from year to year must be increased, one the effort that must be done is that UNTAG Banyuwangi is in addition to implementing the PMB program (admission of new students) with effective and great promotions as well as keeping students who have attended UNTAG Banyuwangi not stop studying midway. Therefore it is necessary to conduct research on the analysis of the quality of education services to the students responses through Quality Function Deployment (QFD) approach in improving the performance of UNTAG Banyuwangi. The sampling result of the level of importance and satisfaction on the dimensions of infrastructure, learning process, human resources, curriculum and student affairs of all variables have corrected total correlation value greater than 0.1430 (r table value) for each dimension, of the sample questionnaire of 83 students have been valid. For the value of  (alpha) obtained each dimension is also greater than 0.05, so it can be concluded that the data is reliable. The results of the analysis of the strengths and weaknesses of UNTAG are based on their importance and level of satisfaction are then plotted into quadrant maps Variables included in quadrant IV are weaknesses for UNTAG Banyuwangi educational institutions, namely: How to teach Lecturers, Strategies for teaching lecturers are understood by students, The ability of lecturers to use learning tools white board, UHP, LCD, lecturers in teaching in class, how to deliver material, how to answer student questions, quality of lecturers in conducting research, community service, infrastructure (office, classroom, laboratory room, studio , library rooms, experimental gardens, etc. except lecturer room), facilities / equipment used in the learning process such as computers, software and hardware. HOQ analysis in the technical response matrix derived from the way the  UNTAG Banyuwangi Institute in answering the request of the Student (Hows). After conducting an interview with the leadership, namely the Rector, the selected technical response was: 1. Providing assistance to the Lecturer to develop the substance of the field of knowledge 2. Sending Lecturers to take part in the learning method training 3. Implementing a cycle of good practice learning processes. 4. Inventory of land, buildings and all the room. 5. Trying to obtain laboratory equipment and information technology.  Keywords: quality of service, Quality Function Deployment (QFD), Higher Education

Deefi Anna, Ika, Fhiliantie, Putri Rani

ASRO JOURNAL - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Institute of Technology - STTAL

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Abstract

ABSTRACT The production activities of a company are influenced by sufficient availability of raw materials. The availability of raw materials will be fulfilled if the supplier regularly sends raw materials in accordance with the planned delivery time. However, each supplier has different capabilities in terms of supply capacity, price, product quality, and delivery time. Determining the right supplier will help the company maintain its production process. This study aims to identify which suppliers are selected to fulfill the demand for each production period and determine allocation of raw material orders to each selected supplier. The model developed to determine selected suppliers have been an integer linear programming. The model has the objective function of minimizing the total cost which consists of purchasing, ordering and holding costs. The constraints include supplier capacity, order quantity allocation, demand, inventory balance, safety stock, timely delivery, non negative and binary. Calculation results in giving a numerical example shows that the developed model is able to select suppliers per period. The model is also able to determine the allocation of raw material orders to selected suppliers. Sensitivity analysis is done to find out which parameters are sensitive. The results of the sensitivity analysis indicate that the parameters of supplier capacity and demand are sensitive parameters.  Keywords: Supplier selection, order quantity allocation, integer linear programming

Dwi Asmoro, Nurcahya, Ciptomulyono, Udisubakti, Putra, I Nengah, Ahmadi, Ahmadi, S Suharyo, Okol

ASRO JOURNAL - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Institute of Technology - STTAL

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Abstract

ABSTRACT Indonesian Navy has a strategic project of building three units of submarines in collaboration with DSME South Korea. In the development cooperation submarine contract DSME also include the implementation of Technology Transfer (TT) between South Korea DSME with PT.PAL Indonesia. Therefore necessary strategies to get success TT process submarines. The task force Navy submarine construction that has always worked between DSME and PT.PAL has helped realize the moral burden for the technology transfer program. How Submarine Task Force strategy to ensure the success of PT.PAL accept TT of DSME? SWOT analysis tries to analyze the variables that influence the strategy and product that work discipline, facilities and infrastructure, the relationship between team performance and PT.PAL DSME is a variable that must be maintained and improved. Submarine task force as a motivator can act as a driving force in improving the performance and things - other matters relating to the development of technology over the course of the submarine.  Keywords: Submarine, TOT, SWOT

Arif H, M Agus, Santoso W, Budi, Ahmadi, Ahmadi, S Suharyo, Okol

ASRO JOURNAL - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Institute of Technology - STTAL

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Abstract

ABSTRACT Scheduling is an assignment activity related to a number of constraints, a number of events that can occur in a period of time and place or location so that the objective function as closely as possible can be fulfilled. In the hierarchy of decision making, scheduling is the last step before the start of an operation. Scheduling the assignment of KRI in Koarmatim is an interesting topic to be discussed and resolved using a mathematical method. The scheduling process of KRI assignments at Koarmatim is done to produce annual JOP / JOG. This process requires not only rapid follow-up, but also requires systematic steps. The scheduling of assignments applied by Koarmatim is currently carried out by personnel by not using mathematical calculations. The ship assignment scheduling process in this research was carried out using the Binary Integer Programming (BIP) method approach with the aim of minimizing costs and maximizing the purpose of the ship assignment. The scheduling observed was 25 ships carrying out operations for 52 weeks (1 year). The mathematical formulation of the BIP model is made up of one objective function and Three constraint functions. Then the development of the BIP model is then completed, the computer uses Excel Solver. The results obtained that the BIP model applied to scheduling KRI Koarmatim assignments is the maximum coverage area reached is 93,651,234 NM2, with an area safeguard level of 76,11 from the entire area of operating sector I to IX (1,230,442 NM2). BIP is an appropriate method to be used as a method in scheduling the assignment of KRI in Koarmatim.  Keywords: Scheduling, Ship assignments, Binary Integer Programming

Wibowo, Haryanto, Ahmadi, Ahmadi, S Suharyo, Okol

ASRO JOURNAL - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Institute of Technology - STTAL

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Abstract

ABSTRACT Indonesia has abundant natural resources of oil and gas energy. Domestic fuel supply is not entirely fulfilled by domestic oil refineries, almost 20% -30% of domestic oil demand must be imported from abroad. This has an impact on the Navy. Steps to address this problem through switching to the use of alternative energy fuels for the Indonesian warship class Patrol Craft 36. The selection of appropriate alternatives requires analysis of information and identification of alternative fuel requirements to be selected. The approach in this study uses Life Cycle Cost method to see the life cycle cost of alternative and combined TOPSIS (Technique For Order Preference By Similarity To Ideal Solution) approach to other than cost factor, and Benefit Cost Ratio. The result of data processing of alternative energy sources selected is gas, CNG (Compressed Natural Gas) with the value of Benefit Cost Ratio 53,7051 Life Cycle Cost IDR 14,168,302,864.  Keywords: Alternative Energy, Life Cycle Cost, TOPSIS.

Amandiri, Satrio Teguh, Ahmadi, Ahmadi, Santoso W, Budi

ASRO JOURNAL - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Institute of Technology - STTAL

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Abstract

ABSTRACT The quality of Transportation system is one of island economic level determinant. Railway transportation evidently more efficient than road transportation. Trans-Sumatra railway construction can be a solution for transportation problem in Sumatra Island. This analysis integrated railway and port to improve economic development in 8 provinces on Sumatra using Spanning Tree and Dijkstra algorithm. It need 1965 kilometers of railway to connect all the 8 provinces. It also generates 1518 kilometers as the distance of Malahayati Port to Panjang Port connection. This integrated system can be a breakthrough solution for Sumatra transportation problem in economic development and the Malacca Strait traffic problem.  Keywords: Trans-Sumatra railway, Minimum Route, Spanning Tree Algorithm, Dijkstra, Algorithm