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International Journal of Global Operations Research

ijgor
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Published by Indonesian Operations Research Association

ISSN : 27231747 EISSN : 27221016 DOI : https://doi.org/10.47194/ijgor

Core Subject : Economy, Science, Education, Engineering,

Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Mathematics

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

Arjuna Subject : Umum - Umum

Articles 164 Documents

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The Influence of Personal Selling and Education on Customer Interest in iB Maslahah Current Account Products at Bank BJB Syariah KCP Arcamanik. Wazdi, Adi Indradi; Yulianti, Santi; Aprilia, Gadis Aisya
International Journal of Global Operations Research Vol. 4 No. 4 (2023): International Journal of Global Operations Research (IJGOR), Nopember 2023
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v4i4.259

Based on the results observations, the background of this research is the lack of personal selling and the lack of education conducted at Bank BJB Syariah KCP Arcamanik, causing a lack of interest in current account products at the Bank. This study aims to find out how the influence of personal selling on customer interest in iB Maslahah current account products at BJB Syariah KCP Arcamanik bank partially and simultaneously. The object of research in this report is the interest of iB Maslahah current account customers at the BJB Syariah KCP Arcamanik bank. The type of research is quantitative associative, with primary data type and using data collection techniques in the form of observation, interviews, literature study, and questionnaires. While the sampling technique is incidental sampling, with a population of 173 people with a sample of 63 people who are iB Maslahah current account customers. The results of the study showed that there was is an insignificant effect between personal selling on the interest of current account customers at Bank BJB Syariah KCP Arcamanik by 9,9% with the results of the t-test where the value of t count>t table (2,572 > 1,670), there were There is a significant influence between education on customer interest in demand deposits at Bank BJB Syariah KCP Arcamanik by 4,4% with the results of the t-test where the value of t count>t table (2,497 > 1,670), and simultaneously there is a significant influence between personal selling and education on customer interest in the iB Maslahah current account product at Bank BJB Syariah KCP Arcamanik by 67% with the results of the F test where the value of fÂ¬count->fÂ¬Â¬table (4,927 > 3,15).

Implementation of Erlang C Formula in Inbound Call Center PT Telekomunikasi Selular Rakhmatsyah, Nauravira Amalina
International Journal of Global Operations Research Vol. 5 No. 3 (2024): International Journal of Global Operations Research (IJGOR), August 2024
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v5i3.319

The use of services has become part of daily activities for humans. However, many users of services have been unable to fully utilize the services, resulting in complaints and requiring assistance. Call center as a service for providing information, technical support, and receiving complaints from service users are a solution to this problem. The large number of incoming calls from service users becomes a problem for service providers, so it is necessary to calculate the performance of the call center to implement the right number of agents. This research applies the Erlang C formula which is implemented in the inbound call center of PT Telekomunikasi Selular. Using data from November and December 2023 by reviewing several aspects, such as delay probability, service level, number of agents, and average delay time shows that the number of agents applied is sufficient, as seen from the service level that has met the desired target, so an increase in the number of agents is unnecessary.

Calculation of Copper Production Failure Risk Level Based on Aggregate Loss Cost Wijaya, Alvian Octa; Thufeil Rafi, Muhammad
International Journal of Global Operations Research Vol. 5 No. 2 (2024): International Journal of Global Operations Research (IJGOR)m May 2024
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v5i2.300

In its implementation, the copper manufacturing industry often faces various risks, one of which is the risk of production failure. This research aims to calculate the level of risk of factory failure in producing copper based on aggregate loss costs. Quantitative methods were used in this research. It calculates the failure frequency, which follows a Poisson distribution, the loss distribution, which follows an exponential distribution function, and the total loss amount.

Evaluation of the Use Off Label Drugs At the Obstetrics and Gynecology Polyclinic at Bandung Private General Hospital Rahayu, Susi Afrianti; Santika, Nita
International Journal of Global Operations Research Vol. 5 No. 1 (2024): International Journal of Global Operations Research (IJGOR), February 2024
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v5i1.290

Off label drugs are drugs outside the indications listed on the label or outside the approval by the authorized institution. This research is a non-experimental type of research that is presented in a quantitative descriptive manner with retrospective data collection. The research sample is the same as the population (total sampling), namely all prescriptions containing off label drugs from an obstetrics and gynecology polyclinic at a private public hospital in Bandung district from May to August 2021. The purpose of the study was to evaluate the use of off label drugs in the indication category based on age, domicile, the type and use of off label drugs. The data obtained from this study were 154 drug users. off label, based on the age range of adolescents 27 (18%), adults 111 (72%), middle 16 (10%), while based on domicile most of the patients came from Baleendah sub-district 37 (24%). The types of drugs used were Mefenamic Acid 38%, Dexamethasone 3%, Metformin 12%, Misoprostol 23%, Nifedipine 8% and Ondansetron 16%. Patients using off label drugs are more common in adults with the drug used is mefenamic acid.

Yemeni and regional maritime doctrine in light of the decline of the liberal theory of freedom of navigation in EEZ Humran, Mohammed Ali
International Journal of Global Operations Research Vol. 5 No. 1 (2024): International Journal of Global Operations Research (IJGOR), February 2024
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v5i1.285

The presence of the USCENTCOM , AFRICOM Â and 34 foreign countries in the vital Yemeni, Arab, and national maritime spheres contributed to a flagrant violation of maritime laws and international political relations. Likewise, the presence and activities of the strategic and tactical military naval units of the aircraft carrier, submarines, and American and British nuclear naval destroyers in the Red Sea. The Gulf of Aden is a breach and violation of international law and agreements regulating freedom of navigation and a blatant assault on Yemeni sovereignty in its vital maritime sphere, as it is located in exclusive Yemeni economic waters, in addition to its nuclear effects in destroying the marine environment and human security. It constitutes a source of danger to food and maritime security, stability, and international peace. The study aims to clarify the influence of Western geopolitical thought and the behavior of American foreign policy in international relations and maritime laws, which is witnessing a major decline and failure in its global policy because it used the policy of American military force to achieve its own political goals and imposed the methodology of Western liberal maritime thought to control and limit the rights of the Yemeni, Arab, and Islamic coastal states. Which contradicts customs, laws, and agreements and affects historical rights and the Yemeni, Arab, and regional maritime domain. The study is expected to confirm the modern Yemeni, Arab, and Islamic hypothesis that the high seas and international maritime waters are within a distance of 200 nautical miles from the baseline and to affirm the right of Yemen and the Arab nation to be protected. The vital area of the United Arab Emirates and the Islamic and regional countries extends from the Atlantic Ocean to the Mediterranean, the Arabian Gulf, the eastern and western Indian Ocean to the Antarctic Ocean, and there is a call for holding maritime conferences in order to develop traditional Western maritime legal theories and concepts that seek to limit the rights of coastal states, establish perceptions, and reach an update to the laws regulating freedom of maritime navigation in accordance with the views of the peoples of the world and in response to global changes in multipolarity.

Inventory Control for Eyeglass Supply Using the P Model Based on Sales Products Sales Forecasting (Case Study: Merry Optic Bandung) Suripto, Adi; Nahar, Julita; Napitupulu, Herlina
International Journal of Global Operations Research Vol. 4 No. 4 (2023): International Journal of Global Operations Research (IJGOR), Nopember 2023
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v4i4.255

Inventory is a resource owned by the company to be used in the production process to meet consumer demand. Companies must be able to control inventory appropriately in order to avoid excess or shortage of inventory by using inventory control. Inventory control is a necessary part of a company that requires an appropriate inventory policy to meet uncertain needs. Based on this background, this study discusses the single item inventory model in the form of photochromic glasses at Merry Optik to find the optimal total inventory cost. In meeting the uncertain needs of the company, the Additive Decomposition forecasting method is used in order to find out the forecast sales data pattern in the future. Uncertain demand causes the inventory system to be probabilistic, so it is necessary to carry out probabilistic inventory control. The P model of the case of back orders was chosen because the range of ordering periods is fixed and the company can buy inventory when it runs out before the time the inventory order is made so that buyers can wait until the inventory arrives. By using Model P for the case of back orders, the company can obtain the period between orders, the total cost of inventory, and the optimal level of service. Based on the results of this study, a pattern of sales forecast data is obtained which repeats every 12 months. Companies must order glasses within a period of 32 days between orders so that it is optimal and able to provide a reduction in the total inventory cost of IDR 21,828,771 with a service level of 95%. Companies can save on inventory costs if they use shorter periods between orders. The total cost of inventory can be more optimal if the company reduces the cost of storing inventory in the warehouse.

Value At Risk (VAR) Analysis using Historical and Monte Carlo Methods in Stock Prices of Bank CIMB Niaga, BSI, BJB, Bank Mega, and Bank Bukopin Helena, Putri Zahra; Puspitasari, Laras Dwi
International Journal of Global Operations Research Vol. 5 No. 3 (2024): International Journal of Global Operations Research (IJGOR), August 2024
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v5i3.320

In daily life and business, risk is unavoidable. Therefore, various ways can be applied to predict and overcome risks. One type of risk that needs to be anticipated especially in the business world is investment risk. Thus, Value at Risk (VaR) is an important tool to predict and anticipate investment risk. This study aims to determine the results of the Value at Risk (VaR) value in the bank sub-sector stock price using the historical simulation method and Monte Carlo simulation for the period 2020-2023. The data used is secondary data sourced from www.yahoo.finance.com which are companies whose stocks are listed on the Indonesia Stock Exchange (IDX) and included in the Indonesia Stock Exchange (IDX). Sampling was carried out by taking 5 bank companies, namely Bank Umum Koperasi Indonesia (BBKB), Bank Pembangunan Daerah Jawa Barat dan Banten (BJBR), Bank MEGA (MEGA), Bank Syariah Indonesia (BRIS), dan Bank CIMB Niaga (BNGA). From the results of the Value at Risk (VaR) value analysis using the historical simulation method and the Monte Carlo simulation method, it is obtained that the company that has the highest VaR risk level is Bank Syariah Indonesia (BRIS).

Risk Analysis of Shallot Farming Production in Malang City Putra, Hazel Pernanda; Manik, Yesaya Chrisyando
International Journal of Global Operations Research Vol. 5 No. 2 (2024): International Journal of Global Operations Research (IJGOR)m May 2024
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v5i2.305

This research aims to determine the risk level of shallot farming and the factors that influence it in Malang City. The sample determination method used was Simple Random Sampling with a sample size of 102 respondents. The research results show that shallot farming in the research area has a high risk with factors that influence the level of production risk being the number of workers, the amount of pesticides, and the amount of NPK fertilizer. Shallot productivity in Malang City is quite high compared to the average shallot productivity in East Java.

Supply Control Of Oil Filter Spareparts Using EOQ And Min-Max Methods Based On Sales Forecast (Case Study: PT Astra International Tbk Soekarno Hatta) Arfemitha, Nurlia Asih; Supian, Sudradjat; Nahar, Julita
International Journal of Global Operations Research Vol. 5 No. 1 (2024): International Journal of Global Operations Research (IJGOR), February 2024
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v5i1.284

Planning and controlling product inventory is very important for a company to ensure demand is met and maximize profits from sales effectively and efficiently. In addition, inventory planning and control are carried out to prevent excess or shortage of inventory. This study aims to predict sales and calculate inventory control to overcome excess stock and increased inventory costs on oil filter spare parts. The forecasting method used is Holt's Double Exponential Smoothing method to determine the number of sales of the four types of oil filter spare parts in the future and overcome the problem of oil filter spare parts inventory using the EOQ and Min-Max methods. Based on the research results, the resulting forecasting is accurate and the EOQ method results in a lower total inventory cost than the Min-Max method.

Determination of Life Microinsurance Premium Using the Commercial Rate Method Widyani, Azizah Rini; Riaman, Riaman; Sukono, Sukono
International Journal of Global Operations Research Vol. 4 No. 4 (2023): International Journal of Global Operations Research (IJGOR), Nopember 2023
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v4i4.256

Microinsurance is insurance that is intended for people who have low incomes which is made with the aim that all levels of society can have insurance with affordable prices. Life insurance is a protection program for families in the event of unwanted things, such as death or permanent disability, to policy holders. This study aims to determine the life microinsurance premium. The data sample used is data on claim and benefit paid by life insurance company obtained from the official website of Otoritas Jasa Keuangan (OJK) Indonesia, which is assumed to have a log-normal distribution. The research method is to test the distribution of claims from the sample data using the Kolmogorov-Smirnov test. Then determine the value of the claim distribution parameter, and then calculating life microinsurance premium using the Commercial Rate method. The results obtained in the form of premium for life microinsurance that are payable by low-income people.

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Editorial Address Jl. Merkuri Timur VI No. 1, RT. 007, RW. 004, Manjahlega, Rancasari, Kota Bandung, Jawa Barat, INDONESIA

Location Kota bandung, Jawa barat INDONESIA

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Contact Name
-

Contact Email
ijgor.iorajournal@gmail.com

Phone
+6285841953112

Journal Mail Official
ijgor.iorajournal@gmail.com

Editorial Address
Jl. Merkuri Timur VI No. 1, RT. 007, RW. 004, Manjahlega, Rancasari, Kota Bandung, Jawa Barat, INDONESIA

Location
Kota bandung,

Jawa barat

INDONESIA