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
164 Documents
<![CDATA[Design a Website-Based Building Materials Inventory Information System At Tb.Gilang Putra ]]>
<![CDATA[Tryana, Anjas]]>;
<![CDATA[Damayanti, Santi]]>
<![CDATA[ International Journal of Global Operations Research Vol. 4 No. 3 (2023): International Journal of Global Operations Research (IJGOR), August 2023 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v4i3.238
<![CDATA[TB. Gilang Putra is a business engaged in the sale of building materials. In the processing of building material supplies, Tb.Gilang Putra uses manual processing. Then Tb.Gilang Putra needs an optimal program to improve its performance. Design a building material inventory information system is a system that will be built to reduce problems contained in the building material inventory information system. The loss and destruction of some data that prevents the data from being inputted. The method used in this building material inventory information system is object orientation (OOAD) and uses the Rational Unified Processes (RUP) model and is supported by Unified Modeling Language (UML) for software engineering processes with good structure. The author draws the conclusion that the system in this design can be useful and alleviate the process of supplying building materials and is able to solve problems that occur so that the system that is run can be used anytime and anywhere. ]]>
<![CDATA[Design And Build Of Website – Based Cake Sales Information System At Aisyah Cake By Al-Ma’soem Rancaekek ]]>
<![CDATA[Rohmanto, Ricky]]>;
<![CDATA[Aminah, Hana Halimah]]>;
<![CDATA[Rismayanti, Syifa]]>
<![CDATA[ International Journal of Global Operations Research Vol. 4 No. 3 (2023): International Journal of Global Operations Research (IJGOR), August 2023 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v4i3.244
<![CDATA[Aisyah Cake By Al-Ma'soem Rancaekek is a food shop that was established on October 2, 2021 at Jalan Rancaekek No. 99, Sayang Jatinangor, Sumedang Regency. At this time the sales system at Aisyah Cake by Al-Ma'soem Rancaekek made sales directly by coming to the store and via telephone to make purchases or ordering goods, to record orders using notes while the sales system was semi-computerized using an application . cashier. The design of information system sales is a system created to solve problems in the sales department at Aisyah Cake By Al-Ma'soem Rancaekek. The method used in this sales information system is OOAD (Object Oriented Analysis and Design) while the model used is RUP (Rational Unified Process) with the development tool in the form of UML (Unified Modeling Language). The purpose of this research is to help alleviate the problems that occur so that the system that is run can be used anytime and anywhere.]]>
<![CDATA[COMPARISON ANALYSIS OF SAW AND SMART METHODS DECISION SUPPORT SYSTEMS IN SELECTIONS ONLINE TRANSPORTATION IN CITY COMMUNITIES BANDUNG ]]>
<![CDATA[Habibi, Chairul]]>;
<![CDATA[Yasyfa, Irtsa]]>;
<![CDATA[Budiman, Budiman]]>
<![CDATA[ International Journal of Global Operations Research Vol. 4 No. 3 (2023): International Journal of Global Operations Research (IJGOR), August 2023 ]]>
Publisher : <![CDATA[iora ]]>
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DOI: 10.47194/ijgor.v4i3.246
<![CDATA[Online transportation is transportation based on a particular application, where consumers order a means of transportation through an application system on a smartphone. This change in lifestyle is used by business actors to start business competition in the online transportation business. In the competition regarding price, convenience, driver courtesy, and satisfaction, there are various kinds of online transportation including Gojek, Grab, Maxim, and InDriver. In the end, this becomes a consideration for the selection of online transportation for the people of Bandung City. To overcome these problems, a Decision Support System was developed using 5 criteria including: Ease, Service Quality, Product Quality, Price and Emotional. Comparative analysis between the Simple Additive Weighting (SAW) and Simple Multi Attribute Technique (SMART) methods was conducted to find out how well the level of relevance of each method was to real conditions. Based on the ranking results from the questionnaire of 100 respondents from the Bandung City community, it is known that the distance difference between the rankings in the SAW method is 0.994 and the SMART method is 0.92. Thus, it can be concluded that the SAW method is considered relatively more relevant to be recommended in this type of case than the SMART method.]]>
<![CDATA[Forecasting Model of the Effect of Vaccination on the Number of Covid-19 Cases in West Java Province ]]>
<![CDATA[Nazihah, Nazihah]]>;
<![CDATA[Nahar, Julita]]>;
<![CDATA[Supian, Sudradjat]]>
<![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.v4i4.242
<![CDATA[COVID-19 adalah virus yang disebabkan oleh SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2) dan pertama kali ditemukan di Wuhan, Hubei, China. Selain menggunakan masker dan melakukan social distancing, cara lain untuk mencegah paparan COVID-19 adalah dengan memberikan dosis vaksin COVID-19 lengkap, yang meliputi dosis pertama dan kedua dari vaksin yang sama, serta dosis booster tambahan untuk peningkatan dosis. kekebalan. Vaksinasi adalah suatu proses di dalam tubuh yang membuat seseorang menjadi sangat kebal atau terlindungi dari suatu penyakit, sehingga jika di kemudian hari terinfeksi penyakit tersebut, mereka tidak akan sakit atau hanya mengalami gejala ringan. Tujuan dari penelitian ini adalah membangun model peramalan untuk mengetahui dampak vaksinasi terhadap jumlah kasus COVID-19 di Provinsi Jawa Barat dan memprediksi jumlah kasus COVID-19 di Provinsi Jawa Barat dengan menggunakan metode regresi linier berganda. Data penelitian yang digunakan terdiri dari jumlah kasus COVID-19 dan penerima dosis vaksin pertama, kedua, dan booster dalam kurun waktu 13 Januari 2021 sampai dengan 22 Januari 2023. Data tersebut diperoleh dari situs resmi PT. Diskes Jabar dan Vaksin Kemkes. Hasil uji statistik dengan kadar alpha 5% menunjukkan bahwa diantara vaksin pertama, kedua, dan booster, hanya vaksin pertama dan kedua yang memberikan dampak signifikan, artinya ada pengaruh efektifitas vaksinasi terhadap jumlah kasus COVID-19. kasus di Provinsi Jawa Barat.]]>
<![CDATA[Analysis of Put and Call Option Pricing on BCA Stock Using the Black-Scholes Model: Financial and Risk Management Perspective ]]>
<![CDATA[Palbeno, Angela Ratna Sari]]>;
<![CDATA[Putri, Natasya Pradini]]>
<![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.v5i3.299
<![CDATA[The Indonesian stock market, especially PT Bank Central Asia (BCA) stock experiences high volatility. Therefore, this research is very important to provide a deeper understanding of the pricing of put and call options as a risk management instrument. This study aims to analyze the pricing of put and call options on PT Bank Central Asia (BCA) shares using the Black-Scholes model and identify factors that affect stock price fluctuations on option prices. This study aims to understand the changes in put and call option prices on PT Bank Central Asia (BCA) shares caused by fluctuations in stock prices. This study uses historical data of PT Bank Central Asia (BCA) shares, volatility, and current interest rates as the basis for analysis. The Black-Scholes method is used as a framework to analyze the pricing of put and call options by considering volatility and interest rates. The results of this study analyze the price changes of put and call options in the face of stock price fluctuations and the factors that affect option prices so as to provide insight into risk management and investment decision making. This research is expected to provide practical guidance for investors and risk managers in making decisions related to put and call options on PT Bank Central Asia (BCA) shares.]]>
<![CDATA[Financial Mathematical Analysis in Applying Interest Rates, Installments, Amortization, Present and Future Values to Home Ownership Loans ]]>
<![CDATA[Reynalda, Bagas]]>;
<![CDATA[Barri, Safiq Rofiul]]>
<![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.v5i2.304
<![CDATA[Home ownership credit has become a choice for many people to own a home, so that credit repayment runs smoothly, there needs to be an analysis from a financial perspective and a strategy for repayment. This paper aims to analyze and calculate the application of financial mathematical concepts in the context of home ownership credit. The main focus involves interest rates, installments, amortization, present and future value. Through a quantitative approach, we investigate the impact of changes in interest rates on monthly payments, explain the amortization mechanism, and evaluate the implications of payment policies on loan repayment times. The result is that by using the application of financial mathematics you can calculate monthly payments, analyze amortization, calculate present value and so on. So this paper can be useful for planning home ownership loans.]]>
<![CDATA[Multi-Item Inventory Control Using Economic Order Quantity (EOQ) Model with Safety Stock, Reorder Point, and Maximum Capacity in Retail Business ]]>
<![CDATA[Mubasysyir, Muhammad Hanif]]>;
<![CDATA[Supian, Sudradjat]]>;
<![CDATA[Hertini, Elis]]>
<![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.v5i1.237
<![CDATA[The presence of retail businesses in Indonesia has many positive impacts on the community, especially in improving the economy. The existence of buying and selling transactions involving suppliers, retailers, and the community as consumers can play a role in improving the national economy. Retail can be called a bridge for suppliers and consumers to meet their needs. The diversity of consumer needs requires retailers to provide a variety of products from many suppliers. Efforts that need to be made by retail businesses in order to minimize costs incurred are by controlling inventory. To prevent excessive expenditure, the inventory control method used is to apply the Economic Order Quantity (EOQ) model. The EOQ model can provide the optimum total inventory cost by adjusting the frequency of orders placed over a period of time. After obtaining the total inventory cost, the calculation of safety stock, reorder point, and maximum capacity can also be applied so that the inventory costs incurred can be minimal.]]>
<![CDATA[Application of the AHP-TOPSIS Method to Support Stock Investment Decisions Based on Financial Ratio Analysis ]]>
<![CDATA[Pardede, Ester]]>;
<![CDATA[Susanti, Dwi]]>;
<![CDATA[Sukono, Sukono]]>
<![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.v4i4.260
<![CDATA[Stock is one form of investment that is currently popular, both for young people, parents, and industry. This can be seen from the increasing number of investors and companies listed on the Indonesia Stock Exchange (IDX). This makes investors confused in determining the best stock choices. Analysis of stock selection needs to be done before someone invest so that the selected stock does not lose and can generate optimal profits. This study discusses the recommendation for alternative stocks from the IDX30 index. The parameters for selecting alternative stocks considered include the criteria of Earning Per Share (EPS), Return on Assets (ROA), Return on Equity (ROE), and Net Profit Margin (NPM). Then the weight of each criterion will be searched using the Analytical Hierarchy Process (AHP) method and sorted using the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method to produce stock recommendations from companies listed on the Indonesia Stock Exchange. The results showed that the Earning Per Share (EPS) criteria became the first priority with a weight of 0,2927, then Return on Equity (ROE) with a weight of 0,2728, followed by Net Profit Margin (NPM) with a weight of 0,2583, and Return on Assets (ROA) with a weight 0,1759. Then alternative results are obtained based on the preference value and ranking 14 companies that have a preference value above 0.5 and can be used as a consideration in making investment decisions, with BBCA as a priority alternative.]]>
<![CDATA[Accelerated Pension Fund Calculations Using the Individual Level Premium Method and the Projected Unit Credit Method Case Study: PT. Dirgantara Indonesia ]]>
<![CDATA[Rohman, Aletta Divna Valensia]]>;
<![CDATA[Mayaningtyas, Chibi Adinda]]>
<![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.v5i3.325
<![CDATA[This paper examines the calculation of accelerated pension funds using two actuarial methods: the Individual Level Premium (ILP) method and the Projected Unit Credit (PUC) method. The case study focuses on PT. Dirgantara Indonesia. We compare the methods' impact on normal contribution amounts, actuarial liabilities, and retirement benefits. The research highlights the advantages and disadvantages of each approach, considering factors like participant age and contribution period. The findings demonstrate that the PUC method generally leads to lower normal contributions but may result in lower final retirement benefits compared to the ILP method. This study provides valuable insights for companies and employees in PT. Dirgantara Indonesia to choose the most suitable method for their accelerated pension plan, considering their financial goals and risk tolerance.]]>
<![CDATA[ANALYSIS OF BREAK EVEN POINT AND MARGIN OF SAFETY AS A BASIS FOR PROFIT PLANNING AT PT UNILEVER INDONESIA TBK IN 2017-2021 ]]>
<![CDATA[Dailami, Ahmad]]>;
<![CDATA[Kardofa, Mochamad]]>;
<![CDATA[Saputra, Jumadil]]>
<![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.v5i3.324
<![CDATA[Earning profit or profit is the main goal of establishing a company. To know how much budget needs to be spent to achieve the goal, the profit must be calculated first. Break even point (BEP) analysis is one of the tools to determine the estimated profit from the sale of the products offered. However, a high margin of safety (MOS) will protect the company from the risk of loss. The purpose of this study is to determine the profit planning for PT Unilever Indonesia Tbk. The method used is a descriptive quantitative method with a case study approach. From the research that has been done, the results show that sales have exceeded the predetermined BEP, as well as the MOS value obtained has a positive trend or an increase. In order to get more maximum results or profits the company needs to also pay attention to achieving sales targets. The target can be achieved if the company can make cost efficiency and increase sales volume.]]>
