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All Journal Asia-Pacific Management and Business Application Jurnal Pendidikan Ekonomi & Bisnis International Research Journal of Business Studies (E-Journal) Al Qalam: Jurnal Ilmiah Keagamaan dan Kemasyarakatan Aptisi Transactions on Technopreneurship (ATT) International Journal of Economics Development Research (IJEDR) Journal of Environmental Science and Sustainable Development Emerging Markets : Business and Management Studies Journal Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences Quantitative Economics and Management Studies The South East Asian Journal of Management Eduvest - Journal of Universal Studies EcoProfit : Sustainable and Environtment Business Journal of Economic, Business & Accounting Research Interaction, Community Engagement, and Social Environment Jurnal Penelitian Pendidikan Indonesia International Research Journal of Business Studies Journal of Entrepreneurial Economics Kemakmuran Hijau: Jurnal Ekonomi Pembangunan Jurnal Inovasi Pangan dan Gizi Sustainable Urban Development and Environmental Impact Journal Journal of Economic Resilience and Sustainable Development
Ratih Dyah Kusumastuti
Departemen Manajemen, Fakultas Ekonomi & Bisnis, Universitas Indonesia, Depok, Jawa Barat, 16424, Indonesia.
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Languange, Linguistic, Communication & Media Mathematics Neuroscience Public Health Social Sciences Other

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The Effect of Labor Flexibility on Firm Performance in Indonesian Telecommunication Industry Natasaputra, Nugraha; Kusumastuti, Ratih Dyah
INTERNATIONAL RESEARCH JOURNAL OF BUSINESS STUDIES Vol 7, No 2 (2014): August-November 2014
Publisher : Universitas Prasetiya Mulya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.798 KB)

Abstract

A Decision-Making Model for Community-Based Food Industry to Support Poverty Alleviation in East Indonesia: Case Study of East Sumba Regency Ratih Dyah Kusumastuti; Fanny Martdianty; Rifelly Dewi Astuti; Nurmala Nurmala
APMBA (Asia Pacific Management and Business Application) Vol 5, No 1 (2016)
Publisher : Department of Management, Faculty of Economics and Business, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (986.912 KB) | DOI: 10.21776/ub.apmba.2016.005.01.1

Abstract

Provinces in the eastern part of Indonesia still have high percentage of residents living below the poverty line. However, some provinces are the producers of food commodities. The One Village One Product (OVOP) movement has been proven to be able to reduce the poverty level and can be implemented in East Indonesia, especially by developing the community-based food industry. The objective of the research is to develop a decision making model to determine the best suitable community-based food industry to be developed optimally in East Indonesia using Analytic Hierarchy Process (AHP). We identify five criteria for the model from the literature and interviews with experts, namely resources, demand, supporting industries, strategy and competitiveness, and supports from government and other parties. We apply the model for the case of East Sumba regency of the East Nusa Tenggara (NTT) province, to select from alternatives, namely cassava, banana, corn and peanut-based food industries. The results show that banana-based industry is chosen as the best-suitable community-based food industry, mainly due to the uniqueness of the banana-based product and high production of banana in the area.
The Effect of Labor Flexibility on Firm Performance in Indonesian Telecommunication Industry Nugraha Natasaputra; Ratih Dyah Kusumastuti
INTERNATIONAL RESEARCH JOURNAL OF BUSINESS STUDIES Vol 7, No 2 (2014): August-November 2014
Publisher : Universitas Prasetiya Mulya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21632/irjbs.7.2.1127

Abstract

Lean Operations Implementation at An Indonesian Shoe Producer Antonio, Bonny Tofani; Kusumastuti, Ratih Dyah
The South East Asian Journal of Management Vol. 13, No. 1
Publisher : UI Scholars Hub

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Abstract

Research Aims: We analyse the impact of lean operations implementation on the performance of an Indonesian shoe producer, identify key success factors of the implementation and propose further improvements to increase company performance Design/Methodology/Approach: A mix of quantitative and qualitative methods is employed. Comparisons of operational and financial performance before and after implementation are conducted to analyse the program's impact. In-depth interviews with six representatives from the shoe producer and its vendor are conducted to rank the key success factors and gain insights into their lean operations implementation. Research Findings: The shoe producer experienced a significant increase in performance after implementing lean operations, and the five most important success factors of the implementation were management commitment and involvement, teamwork, communication, cultural-change management and sustainability of improvement activities. The current performance can still be improved by utilising information technology, implementing a Kanban system, providing direct delivery of raw materials and reducing lead times. Theoretical Contribution/Originality: The paper provides new insights into the challenges faced by the Indonesian shoe producer, especially in its operations and highlights five critical success factors of lean operations implementation. Managerial Implications in the Southeast Asian Context: Results of the present study can be used by other companies in a similar industry in the region to improve their operations and financial performance. Research Limitations and Implications: The impact of implementing lean operations with the proposed improvements to the company's costs and revenues has not been studied in detail.
Determining Criteria for Supplier Selection in the Indonesian Oil and Gas Industry Habibah, Nur; Kusumastuti, Ratih Dyah
The South East Asian Journal of Management Vol. 14, No. 2
Publisher : UI Scholars Hub

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Abstract

Research Aims - This research aims to identify the main criteria of supplier selection in the oil and gas industry in Indonesia and their causal relationships by using the DEMATEL method. Methodology - Based on the literature review and discussions with experts, ten supplier selection criteria were identified and used as the basis of questionnaire development. The questionnaire was distributed to 57 respondents representing supply chain management and other divisions in eight oil and gas companies in Indonesia, with 51 valid responses. The data was analyzed using the DEMATEL method. Research Findings - The results show that product price is the most important criterion, while technical ability was the least important criterion. Moreover, six criteria (product quality, product price, technical ability, service, production capability, and financial situation) were identified as the cause criteria and require more attention compared to the other four effect criteria (delivery performance, stable delivery of goods, lead time, and reaction to demand change in time). Theoretical Contribution/Originality - The research provides insights on the important criteria of supplier selection in oil and gas companies in Indonesia and their causal relationships. Managerial Implications in the Southeast Asian Context - The results can be used by oil and gas companies to better select their suppliers. Research Limitations and Implications - This study uses a non-stratified sample from eight oil and gas companies in Indonesia, which may not accurately represent the Indonesian oil and gas industry.
A Comparative Study of Demand Forecasting for Aftermarket Parts in Heavy Equipment Industry (PT XYZ Case Study) Mahmudi; Ratih Dyah Kusumastuti; Yosman Bustaman
Emerging Markets : Business and Management Studies Journal Vol. 9 No. 2 (2022)
Publisher : Directorate of Academic Research and Community Services

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33555/embm.v9i2.197

Abstract

The global economic crisis has reached the world today, forcing many customers to become more cost aware in their search for better quality and service, and forcing corporate organizations to discover more effective and efficient ways to compete among them. The main objective of this research is to choose the best forecasting method to predict the demandfor spare parts at PT. XYZ highly fluctuating, and to avoid or minimize stockouts. The demand for high-priced spare partsand capital goods is considered discontinuous if it is random and contributes a large part of the inventory value. Fluctuating demand for goods will be difficult to predict, and inaccurate estimates can cause huge losses for the company due to obsolescence of spare parts or unfulfilled demand for spare parts. Running a successful company operation today requires organizational strength to supply the needs of its customers. This study discusses the appropriate demand forecasting method for the fluctuation demand for spare parts products at an Indonesian companynamed PT. XYZ. This study compares four forecasting methods to predict the demand for spare parts at PT. XYZ is the ABCAnalysis, the Moving Average, the Simple Exponential Smoothing (SES) and Exponential Smoothing (ES) with TrendAdjustment. This study uses demand data for 2017-2020 to forecast demand in 2021 and uses the optimum alpha value of0.4065 for SES which is obtained by calculating using MS Excel Solver and uses alpha value of 0.5 and beta value 0.3 for ES with Trend Adjustment. The performance of this forecasting method is determined based on the smallest mean absolute percentage error and the level of forecasting accuracy (tracking signal) which is close to zero, and the results of this study indicate that the use of the Exponential Smoothing with trend adjustment method has the best performance compared to the other three methods.
Analysis of an Indonesian food bank sustainability using system dynamics simulation Salsabila Izzati Syalianda; Ratih Dyah Kusumastuti
Interaction, Community Engagement, and Social Environment Vol. 1 No. 1: (July) 2023
Publisher : Institute for Advanced Science Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/icese.v1i1.2023.174

Abstract

Foodbank is an organization that obtains food from donor organizations and individuals, proceeds the donated food products at storage facilities and distributes them to the end users, either directly or indirectly via charitable institutions. Foodbanks have been developed in several countries to tackle food waste and hunger problems. This research uses the case of FoodCycle Indonesia (FCI) as one of the food banks in Indonesia that has been in operation since 2017. The purpose of this study is to analyze the sustainability of FCI using system dynamics simulation to identify the factors that influence its sustainability. We develop the initial model based on literature and modify it according to interview results with representatives from FCI and its two partners (charitable organizations that redistribute the donated food to beneficiaries). The model consists of partners, wedding partners, food redistribution, transportation cost, community, volunteers, beneficiaries, and food balance subsystems. Based on the simulation results it can be concluded that FCI will be sustainable as long as the growth of the food supply is constant, and the organization has the financial ability to support the distribution of donated food to the beneficiaries.
Inventory Analysis using Multi-Criteria ABC and ISM Method – A Case Study in Indonesia’s Aviation MRO Dita Pradini; Ratih Dyah Kusumastuti
Quantitative Economics and Management Studies Vol. 5 No. 1 (2024)
Publisher : PT Mattawang Mediatama Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/454RI.qems2166

Abstract

Level of inventory plays a crucial role in managing the supply chain in a company, one of which is Aircraft Maintenance, Repair, and Overhaul (MRO) Company. This paper will analyze the material inventory in one of Indonesia’s aircraft MRO companies by categorizing the material and focus on finding the root causes of the high inventory level. ABC Analysis using multiple criteria will be used to categorize the aircraft spare parts inventory. The categories will then be used as the Focus Group Discussion (FGD) topic to gain and determine several root causes of the phenomena. FGD results will then be further analysed using Interpretative Structural Matrix (ISM) to see if there are some interrelationships between root causes. The high inventory level of aircraft spare parts inventory root causes will be specifically determined by analyzing the A category of ABC Classification as this category represents 70% of the inventory. Based on the analysis, it is recommended to solve the root causes extracted from the ISM first to lower the inventory level. This study will be useful for managers to determine the strategy to make the inventory lower impacting on the increase of company’s profit increase.
Strand Inventory Analysis of Post Tension in PT XYZ Using Discrete-Event Simulation Method Fakhrana Oktia Dyahnawangsari; Ratih Dyah Kusumastuti
Quantitative Economics and Management Studies Vol. 5 No. 2 (2024)
Publisher : PT Mattawang Mediatama Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/454RI.qems2495

Abstract

The development of connectivity infrastructure, particularly toll roads, is planned to continue expanding and reach 3,500 km by 2030. This signifies a positive outlook for the construction industry. This research conducted to analyse the management of post tension raw materials and determine the optimal policies using the discrete-event simulation method. Simulation scenarios were developed using the Arena application, taking into consideration the demand patterns for post tension work. The validation test results confirmed the capability of the base case model in accurately representing real-world conditions. Scenario development was carried out to influence the strand inventory pattern by incorporating reorder points and adjusting order sizes. Based on the scenario analysis, the most effective approach was found to be setting a reorder point of 3 tons and an order size of 5 tons. The implementation of this analysis successfully reduced the strand inventory by 58.78%. This research enables companies to optimize their inventory, reduce costs, and enhance operational efficiency. The findings contribute to the development of strategies that support sustainable growth in connectivity infrastructure in Indonesia.
Assessing The Supply Chain Risks of an Indonesian Electricity Company Anugrah Kesuma; Ratih Dyah Kusumastuti
Quantitative Economics and Management Studies Vol. 5 No. 3 (2024)
Publisher : PT Mattawang Mediatama Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/454RI.qems2542

Abstract

Energy is a crucial necessity for human societies, and access to electrical energy plays a significant role in economic development. A state-owned enterprise (SOE) is entrusted with the provision of electrical energy across Indonesia. The objective of this study is to identify and assess risk factors within the supply chain of primary distribution materials at SOE. The identification of risk factors was based on a comprehensive review of literature across various industrial sectors, further validated through consultations with senior managers at the company. For the assessment of these risks, the study employed the modified Decision Matrix Risk Assessment methodology, which involves evaluating risks based on their likelihood and impact. This evaluation was conducted through surveys distributed to 66 respondents, including planning managers, distribution managers, and commercial managers across all regional and distribution main units in Indonesia. Two risk categories with five sub-categories and a total of 27 risk factors were identified. Supply-related risks are the most significant compared to the other four sub-categories. Scarcity of raw materials, lack of capacity flexibility, and failure to make delivery requirements are in the top three rankings. This research can enrich the supply chain risk literature and provide valuable insights for utility managers in understanding supply chain risks.
Co-Authors Adrin, Ghea Rizky Alexander Evan Putra Antonio, Bonny Tofani Anugrah Kesuma Bonny Tofani Antonio Bustaman, Yosman Dita Pradini Dwi Nastiti Danarsari Dwiyana, Meidi Ekaputri, Azaria Fajar Ayu Pinagara Fakhrana Oktia Dyahnawangsari Fanny Martdianty Hardiansyah Sucipta Harrtyan Muhammad Hendrawidjaja, Josef Budi Jayanagara, Oscar Keanoubie, Muhammad Kusuma, Anak Agung Ngurah Abidzarr Dipo Lea Pungky Rahayu Lenny Lidiawaty Lenny Suardi Mahmudi Mauliate, Andreas Immanuel Muhammad, Harrtyan Natasaputra, Nugraha Natasaputra, Nugraha Nindiya, Theresia Mayke Nugraha Natasaputra Nur Habibah Nurdianto, Kresna Nurmala Nurmala Nurmala Nurmala Okatria, Luqy Afifah Permata Wulandari Rahayu, Lea Pungky Rifelly Dewi Astuti Rouli, Juliana Ruslan Prijadi Salsabila Izzati Syalianda Saraswati, Mia Siswahyudianto Soetjipto, Budi Widjaja Syalianda, Salsabila Izzati Tengku Ezni Balqiah Theresia Mayke Nindiya Viverita Yosman Bustaman Zaafri Ananto Husodo