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All Journal JURNAL PENDIDIKAN TAMBUSAI Bisnis Net : Jurnal Ekonomi dan Bisnis LEARNING : Jurnal Inovasi Penelitian Pendidikan dan Pembelajaran Journal of Artificial Intelligence and Digital Business Jornal Of Tourism Sciences (Toursci) Journal Of Medicine And Health Sciences (Medisci) Journal Of Engineering Sciences (Improsci) MILANG Journal of Mathematics and Its Applications
Andri Hermawan, Andri
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Journal : Journal Of Engineering Sciences (Improsci)

 1 
Analysis Of Time Motion Study Comparison For Coconut Husk Processing With Coconut Husk Crushing Machine Assistive Tool Hermawan, Andri; Trisolvena, Muhammad Nana; Nurudin, Arif
Jurnal Improsci Vol 2 No 4 (2025): Vol 2 No 4 February 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i4.615

Abstract

Background. Entrepreneurs utilize abundant raw materials by making coconut husk, which is the main ingredient in making coconut husk brooms. However, many still use conventional methods to process it, such as pounding it until it becomes fiber. Aim. To be carried out effectively, it is deemed necessary to have technological assistance, such as the Coconut Husk Shredding Machine. Methods. However, to ensure that the aid has improved the effectiveness of the coconut husk shredding process, it is necessary to analyze and compare the time motion study between the two methods. By comparing the Standard Time between the two methods, Result. We can determine the extent of the difference, allowing us to quickly estimate the amount of product produced from coconut husk shredding within a specific time frame or how long it takes to process the available amount of coconut husk. Conclusion. The research and time motion study analysis results in an activity of shredding coconut husks using conventional methods and machines, which aligns with the hypothesis that shredding coconut husks using machines is 2.91 minutes faster than traditional methods. Implication. This work time measurement recommendation can be used as a standard time measurement in shredding coconut husks using conventional and machine methods.
Study on Supply Chain Rearrangement to Improve Supply Chain Performance of Sambal Sauce in Company X Case Study using the Enterprise Architecture Design method that utilizes Industrial Revolution 4.0 Technology based on Hybrid Technology Hermawan, Andri; Idris, Mohd Razif; Binti Mustaffa Bakry, Faridah
Jurnal Improsci Vol 2 No 2 (2024): Vol 2 No 2 October 2024
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i2.493

Abstract

Company X is a large enough producer of Sambal Sauce to supply Meatball traders in Indonesia. Many problems in this supply chain include the occurrence of unhealthy competition between internal networks, both between agents and other networks that intersect between supply regions, market prices are not uniform, the availability of field products is not maintained, the uncertainty of delivery from the previous supply from the Supply Chain, high Debts and Receivables from Distributors, the certainty of product delivery to the Supply Chain from Producers, The certainty and stability of the delivery of Sambal Sauce Raw Materials to the Factory, unstable quality of raw materials, and many other problems. Of course, this needs to be fixed immediately, considering that it will be a turning point for product returns if this problem continues. The following is a deeper study of what and why this happens, how to solve the problem, and concrete efforts to solve the problem analytically using the Enterprise Architecture Design method by utilizing Hybrid Technology-based Industrial Revolution 4.0 Technology.
State-Owned Enterprises (SOEs) in Construction Services in Indonesia Idris, Mhod Razif; Hermawan, Andri
Jurnal Improsci Vol 2 No 5 (2025): Vol 2 No 5 April 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i5.1026

Abstract

Background. The construction industry plays a strategic role in Indonesia’s economic development, particularly through State-Owned Enterprises (SOEs) that are mandated to deliver national infrastructure projects. Despite their importance, Indonesian construction SOEs continue to face persistent challenges, including low productivity, cost overruns, schedule delays, bureaucratic complexity, and limited organizational agility. Lean Management has been widely recognized as a practical approach to improving efficiency and reducing waste; however, its application in the construction sector has predominantly focused on project-level operations rather than organizational-level readiness. Aims. This study aims to identify the key factors influencing the successful implementation of Lean Management in Indonesian construction SOEs and to assess how these factors interact in determining organizational readiness. Methods. A quantitative research design was employed, with a structured survey administered to 246–250 respondents from six major Indonesian construction SOEs. The study adopts the Lean Construction Maturity Model (LCMM), consisting of 11 main attributes: lean leadership, customer focus, organizational culture, competency, process and tools, change management, work environment, business results, and learning and competency development. Data were analyzed using linear regression to examine relationships among influencing factors and their contribution to Lean Management readiness. Result. The findings are expected to yield a Lean Management Implementation Readiness Index that provides a comprehensive measure of organizational preparedness and highlights critical interdependencies among factors. Conclusion. The study contributes theoretically by extending lean management research to the organizational level within construction SOEs and practically by offering a diagnostic tool to support strategic decision-making, policy formulation, and performance improvement in Indonesia’s construction sector.
Production Quantity Estimation Method in Continuous Line Flow and Discontinuous Line Flow Systems with Barchart Simulation Idris, Mhod Razif; Hermawan, Andri
Jurnal Improsci Vol 3 No 3 (2025): Vol 3 No 3 December 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v3i3.1035

Abstract

Background. Production quantity forecasting is a crucial element in the planning and control of manufacturing systems, as it directly affects operational efficiency and capacity utilization. Production systems are generally classified into continuous and discontinuous line flow, which differ in process flow characteristics and levels of variability. Aims. This study aims to examine production quantity forecasting methods for both systems using a Barchart simulation approach as a visualization and process time analysis tool. Methods. The research method used is a systematic literature review and conceptual modeling based on production time, cycle time, setup time, and waiting time. Conclusion. The results of the study indicate that Barchart simulation is effective in representing the stability of production flow in continuous line flow systems and identifying process variability and irregularity in discontinuous line flow systems. Implementation. Thus, the Barchart simulation can be used as a simple yet informative tool to support production quantity forecasting based on manufacturing system characteristics.
Lean Construction: Enhancing Efficiency And Quality In The Construction Industry Idris, Mhod Razif; Hermawan, Andri
Jurnal Improsci Vol 3 No 2 (2025): Vol 3 No 2 October 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v3i2.1051

Abstract

Background. Lean Management and Lean Construction have been widely recognized as effective approaches to improving efficiency, reducing waste, and enhancing organizational performance. However, the readiness of construction organizations—particularly State-Owned Enterprises (SOEs)—to implement Lean Management remains insufficiently explored, especially in developing countries. Aims. This study aims to assess the factors influencing Lean Management implementation and to evaluate the readiness level of Indonesian construction SOEs using a quantitative approach. The research adopts Lean Management as its theoretical foundation and applies the Lean Construction Maturity Model (LCMM) as the primary measurement framework to capture organizational readiness comprehensively. Methods. Data were collected through a structured questionnaire distributed to management-level respondents across six Indonesian state-owned construction companies, involving division heads, section managers, staff, and project managers, with a total sample of approximately 250 respondents. The analysis employs linear regression within a structural model to examine the relationships among key readiness factors, including leadership, culture and behavior, competence, continuous improvement support, processes and tools, organizational change, work environment, business results, and learning and competency development. Result. The findings are expected to provide empirical insights into the interdependencies among these factors and to identify critical readiness gaps that may hinder effective Lean Management implementation. Conclusion. This study contributes theoretically by extending the application of LCMM to Lean Management readiness assessment and practically by offering a structured diagnostic framework for SOEs seeking to enhance Lean adoption in the construction sector.
Rubber Ball Theory: An Elastic Model of Production Line Balancing and Its Impact on Supply Chain Performance Kartini, Nuri; Hermawan, Andri; Idris, Mohd Razif
Jurnal Improsci Vol 3 No 4 (2026): Vol 3 No 4 February 2026
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v3i4.1054

Abstract

Background. Production line balancing is a key element in improving the capacity and stability of manufacturing systems, yet conventional practices often ignore the elastic relationship between production intervals, capacity, and resource structure. This research develops and formalizes Rubber Ball Theory, a theoretical approach that views production systems as elastic entities, where changes in one operational variable trigger compensatory responses in other variables. Aims. The objective of this research is to develop a mathematical model for interval-based production line balancing and analyze its impact on overall supply chain performance. Methods. The research methodology includes developing an interval-based line-balancing optimization model, integrating concepts of bottlenecks and elastic capacity planning, and conducting empirical testing through a manufacturing industry case study. The developed model minimizes the system interval as the primary control variable, accounting for capacity constraints, precedence relationships, and parallel machine configurations. Sensitivity analysis is performed to evaluate the system's response to changes in the target interval and the number of parallel resources. Result. The results show that emphasizing production intervals without adjusting structural capacity leads to system instability and bottleneck displacement, while an elastic approach based on Rubber Ball Theory can sustainably increase production capacity. Furthermore, this approach has been shown to improve the reliability, responsiveness, and efficiency of asset management in the supply chain and contribute to reducing the variability of production flows that trigger the bullwhip effect. Conclusion. The main contribution of this research is the provision of an integrated conceptual and mathematical framework linking production line balancing to supply chain performance through elastic management of production intervals. Implication. These findings provide theoretical and practical implications for designing more adaptive and sustainable production systems and capacity planning.
Improving Food Security and Sustainability in Koperasi Merah Putih: A Conceptual Model of Food Supply Chain Management Widyani, Retno; Kartini, Nuri; Hermawan, Andri; Idris, Mhod Razif
Jurnal Improsci Vol 3 No 4 (2026): Vol 3 No 4 February 2026
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v3i4.1055

Abstract

Background. Food security and sustainability are key challenges in the modern food system, characterized by fragmented production, high food losses, and weak coordination among supply chain actors. Food Supply Chain Management (FSCM) is a strategic approach to integrating the flow of products, information, and logistics from upstream to downstream. Aims. This study aims to develop a conceptual model of FSCM based on Koperasi Merah Putih, the primary institutional actor in strengthening the food supply chain. Methods. The research method employed a systematic literature review of relevant scientific publications and policy documents. Result. The study results indicate that the Koperasi Merah Putih has the potential to act as a supply chain coordinator through production aggregation, logistics management, and information management. Information technology support, government policies, and logistics infrastructure strengthen the cooperative's ability to improve FSCM performance. Conclusion. Optimal FSCM performance subsequently contributes to increased food security and the sustainability of the food system. Implementation. The developed conceptual model is expected to serve as a basis for further empirical research and a reference for formulating cooperative-based food policies.
Co-Authors Agustin, Gysella Aedeliya Ardana, N. K. Kutha Arif Nurudin Artharina, Fillia Prima Binti Mustaffa Bakry, Faridah Dwi Cahyani, Gusti Ayu Desy Estik Hari Prastiwi, Estik Hari Hadi Sumarno I Wayan Mangku Idris, Mhod Razif Idris, Mohd Razif Jaya, Suhana Minah Kartini, Nuri Muhamad Muhamad Salman Alfaris, Salman Siahaan, Eva Delia Putri Suyatmi Suyatmi Taufik, Nawir One Trisolvena, Muhammad Nana Widyani, Retno Zaelani, Abd Kadir