International Journal of Global Operations Research
International Journal of Global Operations Research (IJGOR) is published 4 times a year and is the flagship journal of the Indonesian Operational Research Association (IORA). It is the aim of IJGOR to present papers which cover the theory, practice, history or methodology of OR. However, since OR is primarily an applied science, it is a major objective of the journal to attract and publish accounts of good, practical case studies. Consequently, papers illustrating applications of OR to real problems are especially welcome. In real applications of OR: forecasting, inventory, investment, location, logistics, maintenance, marketing, packing, purchasing, production, project management, reliability and scheduling. In a wide variety of environments: community OR, education, energy, finance, government, health services, manufacturing industries, mining, sports, and transportation. In technical approaches: decision support systems, expert systems, heuristics, networks, mathematical programming, multicriteria decision methods, problems structuring methods, queues, and simulation. Topics Covered: Computational Intelligence Computing and Information Technologies Continuous and Discrete Optimization Decision Analysis and Decision Support System Applied Operations Research in Education Engineering Management Environment, Energy and Natural Resources Financial Engineering Applied Operations Research inGovernment Heuristics Industrial Engineering Information Management Information Technology Inventory Management Knowledge Management Logistics and Supply Chain Management Maintenance Manufacturing Industries Applied Operations Research in Marketing Engineering Markov Chains Mathematics Actuarial Sciences Military and Homeland Security Networks Operations Management Organizational Behavior Planning and Scheduling Policy Modeling and Public Sector Applied Operations Research inPolitical Science Production Management Applied Operations Research inPsychology Queuing Theory Revenue & Risk Management Services management Simulation Applied Operations Research inSociology Applied Operations Research inSports Statistics Stochastic Models Strategic Management Systems Engineering Telecommunications Transportation And so on
Articles
174 Documents
<![CDATA[College Students' Perceptions Toward Usability of Simulator Application as a Form of Virtual Experiment at the Distance Learning ]]>
<![CDATA[Nurdiana, Dian]]>;
<![CDATA[Hasanah, Siti Hadijah]]>;
<![CDATA[Maulana, Muhamad Riyan]]>
<![CDATA[ International Journal of Global Operations Research Vol. 5 No. 1 (2024): International Journal of Global Operations Research (IJGOR), February 2024 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v5i1.269
<![CDATA[The use of simulator applications as one of the learning media is used in face-to-face classes. Its use is rarely used to support distance learning. In fact, the distance learning process must have the same quality as face-to-face learning. The role of technology and media is one of the keys to success in conveying material to students. This study examines the use of simulator applications in distance learning in terms of its reusability. The simulator application used is Cisco Package Tracer on learning computer networks with modules as the main teaching material used by students. The use of this media aims to understand and practice computer network simulations. By involving 60 participants, a case study regarding usability feasibility was measured by using the USE Questionnaire which consisted of 4 usability dimensions: Usefulness, Ease of Use, Ease of Learning, and Satisfaction. The findings show that the use of simulator applications in distance learning gets good or positive responses in the context of usability. This shows that the use of simulator applications is suitable for use in distance learning.]]>
<![CDATA[Application of Black Scholes Method to Determining Premium Insurance In the Potato Agricultural Based on Price Index ]]>
<![CDATA[Sutisna, Sarah]]>;
<![CDATA[Sukono, Sukono]]>;
<![CDATA[Napitupulu, Herlina]]>
<![CDATA[ International Journal of Global Operations Research Vol. 4 No. 4 (2023): International Journal of Global Operations Research (IJGOR), Nopember 2023 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v4i4.258
<![CDATA[Potato is one of the leading horticultural commodities. Potato farming business often experiences price fluctuations that cause losses to farmers.The government is making efforts to minimize the farmers' losses by issuing agricultural insurance programs. This study aims to determine the relationship between potato prices at the provincial level and potato prices at the farmer level and to determine agricultural insurance premiums based on the price index. The data used are potato price data at the West Java Province level and potato price data at the farmer level in Pangalengan District. The correlation between provincial level prices and farmer level prices can be obtained using the Pearson Product Moment correlation method. The price index is calculated using the relative price index method. Determination of the premium to be paid by farmers using the Black-Scholes method. The results of the analysis show that potato prices at the West Java Province level have a very strong correlation with farmer prices in Pangalengan District in October. Based on the Black-Scholes method, the premium value depends on the trigger value obtained with a price range between IDR 9,806,100.00 to IDR 10,267,784.00 for a sum insured of IDR 39,403,000 per one contract period. Various premium values can be a consideration for farmers in choosing an agricultural insurance policy.]]>
<![CDATA[Use of Constant Type Cost Prorate Method in Calculation of Actuarial Liability of Pension Funds ]]>
<![CDATA[Putrie, Veronica Clasrissa]]>;
<![CDATA[Nurdyah, Himda Anataya]]>
<![CDATA[ International Journal of Global Operations Research Vol. 5 No. 3 (2024): International Journal of Global Operations Research (IJGOR), August 2024 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v5i3.321
<![CDATA[The purpose of this study is to calculate the actuarial liability value of pension funds using the Constant Percent type Cost Prorate method. This method is a pension funding method that calculates pension benefits based on the employee's salary since he first entered work. The method in this study is used to calculate the amount of actuarial liabilities that must be issued by the company to employees at the time of normal retirement, namely 58 years. The data used is the data of a Civil Servant of the Social Service in DKI Jakarta who is 55 years old. Normal contributions and actuarial liabilities that must be prepared by pension companies for pension plan participants increase as the age of pension plan participants increases. Based on the calculation results, the accumulated actuarial liabilities that must be prepared by the pension plan company in 2020 are IDR 3,843,981,410. ]]>
<![CDATA[CALCULATION OF RICE COMMODITY AGRICULTURAL INSURANCE PREMIUM PRICES BASED ON RAINFALL INDEX USING THE BLACK-SCHOLES METHOD ]]>
<![CDATA[Setyapamungkas, Febriaputra]]>;
<![CDATA[Gymnastiar, Muhammad]]>
<![CDATA[ International Journal of Global Operations Research Vol. 5 No. 2 (2024): International Journal of Global Operations Research (IJGOR)m May 2024 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v5i2.307
<![CDATA[This study applies the Black-Scholes method to calculate rice commodity insurance premiums based on rainfall indexes. By considering rainfall fluctuations as the primary risk in rice production, the Black-Scholes method provides a more accurate and efficient estimation of insurance premiums. The research involves historical rainfall data collection and statistical analysis, resulting in realistic premium pricing. This innovative approach enhances risk management and sustainability in the rice commodity sector, benefiting stakeholders such as insurance companies and farmers. Future research should explore additional factors, including agricultural technology and government policies, for further refinement of premium calculation models.]]>
<![CDATA[Analgetic Effects of Kangkung (Ipomea reptans Poir) Extract on Swiss Webstesr Mice ]]>
<![CDATA[Handayani, Andi Ika Julianti]]>;
<![CDATA[Hidayat, Saepul]]>
<![CDATA[ International Journal of Global Operations Research Vol. 5 No. 1 (2024): International Journal of Global Operations Research (IJGOR), February 2024 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v5i1.288
<![CDATA[One of the efficacious plants as an empirical analytic is kangkung (Ipomea reptans Poir). The purpose of this study was to determine the analgesic effect of kangkung and determine the dose of kangkung extract compared to ibuprofen. The benefit of this research is to know the analgesic effect of kangkung extract. The contents of extract kangkung are flavonoids. The research method of this experimental test is divided into 5 groups, each group consisting of 5 mice with weight 20-30 grams and age 2-3 months. Group 1 Negative control (Aquadest), group II Positive control (the suspension of ibuprofen), group III, IV, and V respectively were given the ground kangkung extract dose 6 mg/30 g, 12 mg/30 g, 24 mg/30 g. The treatment is administered orally, and for the introduction of the induction using acetic acid 0.5% dose 0.2 ml/20 g mice are intraperitonial. The result of analyzed by Test homogeneity followed by a Variant analyze Test (ANOVA) one way with SPSS for window version 16. The homogenized results of the research of extract kangkung land extract (P = 0.24), a one-way test is obtained significant result 0.00, the dose I, II, III differs significantly with negative and positive control. Conclusion of the ground Kangkung extract has an analytic effect by lowering the amount of stretched. The results showed at a dose of 28 mg/30 g mice caused the best analytic effect among the variations of the dose tested.]]>
<![CDATA[THE PLANNING FOR UPPER SHOES RAW MATERIAL INVENTORY USING THE MATERIAL REQUIREMENT PLANNING (MRP) METHOD (Case Study : PT X) ]]>
<![CDATA[Apriliza, Poppy]]>;
<![CDATA[Supian, Sudradjat]]>;
<![CDATA[Nahar, Julita]]>
<![CDATA[ International Journal of Global Operations Research Vol. 4 No. 4 (2023): International Journal of Global Operations Research (IJGOR), Nopember 2023 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v4i4.235
<![CDATA[The planning of raw material inventory is one of the essential factors in planning the order of the raw materials that can make a company maintain its production quality. The company’s policies can be implemented in various ways, such as in planning the raw materials inventory to avoid shortages and excesses of the raw materials supply. However, X Inc. has not implemented inventory planning properly, making the costs incurred by the company not optimal. Thus, Material Requirement Planning (MRP) will be used to determine the scheduling time and quantity of raw materials for ordering with lot sizing techniques. Lot sizing techniques provide solutions to determine the right quantity of raw material orders and minimum total inventory costs with techniques which are Lot for Lot (LFL), Least Unit Cost (LUC), Economic Order Quantity (EOQ), and Silver-Meal. Based on the calculation results, the four lot sizing techniques show that the LFL technique is the optimal technique compared to other techniques because it produces the minimum inventory cost of Rp566.015.685,05. Thus, the company can profit Rp13.295.563,75 compared to company policy.]]>
<![CDATA[Implementation of Jackson Queueing Network in General Polyclinic and Dental Polyclinic Patient Services at Jelekong Health Center ]]>
<![CDATA[Rasyid, Thariq Ahmad]]>;
<![CDATA[Supian, Sudradjat]]>;
<![CDATA[Nahar, Julita]]>
<![CDATA[ International Journal of Global Operations Research Vol. 4 No. 4 (2023): International Journal of Global Operations Research (IJGOR), Nopember 2023 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v4i4.229
<![CDATA[The buildup in the service system is generally caused because service facilities cannot meet service needs, so service users need time to use the facilities. Health Center is one of the facilities that provide services in the health sector. However, the number of doctors needed in health centers in Indonesia has yet to be met, and the number of patients who are never empty every day causes a buildup in the service system. The application of the service network system using the open Jackson queueing network can model the optimal service system and analyze its performance. The observation method was used to observe patients' arrival and departure times at the Jelekong Health Center, especially in the registration section, general polyclinic, dental polyclinic, and pharmacy, for three days. There was an increase in patient waiting time before being served and time in the system at the general polyclinic after implementation, so one additional service facility was added. Meanwhile, the dental polyclinic experienced decreased patient waiting time before being served and time in the system, so there was no need to add service facilities.]]>
<![CDATA[Profit Planning Analysis with Break Even Point Approach at PT. Sinar Jaya ]]>
<![CDATA[Bisyarah, Sania]]>;
<![CDATA[Elizabeth S, Sri Novi]]>
<![CDATA[ International Journal of Global Operations Research Vol. 5 No. 3 (2024): International Journal of Global Operations Research (IJGOR), August 2024 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v5i3.327
<![CDATA[Sales management is important for a company to control profitability and avoid the risk of loss. In reality, companies are often faced with the possibility of loss and the ability to manage sales can affect the magnitude of this risk. Break Even Point (BEP) analysis can be an effective strategy to determine the minimum sales amount so that the company avoids losses. In this study, analyzed sales at PT Sinar Jaya using BEP analysis for the period January to December 2023. The results of the analysis show that the company is consistently able to achieve BEP and earn profits above 7% every month which reflects operational efficiency in profit stability. In addition, the Margin of Safety (MoS) value which is always above 20%, with a peak reaching 70%, shows that the company has strong protection against risk.]]>
<![CDATA[Markov Chain Analysis of Problematic Financing in Sharia Banks ]]>
<![CDATA[Cahyandari, Rini]]>;
<![CDATA[Rahmawati, Weni]]>;
<![CDATA[Saepuloh, Aep]]>
<![CDATA[ International Journal of Global Operations Research Vol. 5 No. 2 (2024): International Journal of Global Operations Research (IJGOR)m May 2024 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v5i2.292
<![CDATA[Indonesia is the country with the largest Muslim population in the world, which makes people start to switch to sharia banking services because they do not use the usury system. This can be seen from the role of the community in using sharia banking services, including in distributing funds. From financing activities, the more funds distributed, the greater the potential for risk to arise. If there are customers who do not comply with installment payments, this will create a problem in financing in sharia banking, which is called problematic financing. The classification and criteria for problematic financing are divided into three, namely substandard, doubtful and nonperforming. To overcome this risk, preventive measures are taken, one of which is by knowing the possibility of financing problems in the future, which can be calculated using Markov chain analysis. This research uses secondary data on substandard, doubtful and non-performing problematic financing in the period 2016 to 2021 at several sharia banks in Indonesia. The opportunity value is searched until it meets the balance condition (steady state). Based on the research results, it was found that Sharia Commercial Banks (BUS) will experience a state of balance at step 5, Sharia Business Units (UUS) will experience a state of balance at step 11, Sharia Rural Banks (BPRS) will experience a state of balance at step 6.]]>
<![CDATA[Comparative Analysis of Network Development Local Area Network (LAN) Fiber Optical Cable with Unshielded Twisted Pair (UTP) Cat 6 Cable at SMK Negeri 2 Tasikmalaya ]]>
<![CDATA[Ashari, Ami]]>;
<![CDATA[Rubiani, Hani]]>;
<![CDATA[Manova, Yovi]]>
<![CDATA[ International Journal of Global Operations Research Vol. 5 No. 1 (2024): International Journal of Global Operations Research (IJGOR), February 2024 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v5i1.286
<![CDATA[The LAN Network at SMK Negeri 2 Tasikmalaya previously used media UTP Cat5e network with poor performance due to bandwidth UTP Cat5e is only 200 Mb/s, therefore the school choose to replace it network media with fiber optics, with a bandwidth that can reach 1 Gb/s. On the other there is still UTP Cat6 with the same bandwidth of 1Gb/s at a cost installation is lower than fiber optic network installation. Data collection on performance is carried out using the Quality of Service (QoS) approach with the parameters measured, namely Delay, Jitter, Packet loss and Throughput using Wireshark software. Performance of fiber optic and UTP Cat6 networks at SMK Negeri 2 Tasikmalaya in categorize “Good†according to Telecommunications and Internet Protocol Hormonization Over Network (TIPHON) standards. Test results from optical fiber obtained a delay of 2.58 ms, jitter of 2.38 ms, packet loss of 0.254 and throughput of 805.92 Mbps. The test results of the UTP Cat6 cable were obtained delay of 5.59 ms, jitter of 5.21 ms, packet loss of 0.559 and throughput of 623.73 Mbps.]]>
