Analysis of Raw Material Inventory Control for Smoothness of The Production Process Using MRP (Material Requirement Planning) Method at The Tofu Factory of Guyub Rukun in Malang City

Danda; Anung Prasetyo Nugroho; Yuni Setyawati

Authors

Danda Management, Faculty of Economics, University of Tribhuwana Tunggadewi, Malang, Indonesia
Anung Prasetyo Nugroho Management, Faculty of Economics, University of Tribhuwana Tunggadewi, Malang, Indonesia
Yuni Setyawati Management, Faculty of Economics, University of Tribhuwana Tunggadewi, Malang, Indonesia

Keywords:

Production process, MRP method , Inventory control , raw material, Smoothness

Abstract

This research was conducted with the aim of finding out whether the analysis of raw material inventory control carried out by the Guyub Rukun tofu Factory was effective in the production process in Lowokwaru District Malang City, to find out how the raw material inventory control process works for the production process, The research design in this study is to use a quantitative approach method. This research using quantitative methods is research that aims to describe and understand the phenomena experienced by research subjects, for example regarding the analysis of raw material inventory control for the smooth running of the production process using the MRP method. In this study, the collected data was then processed using quantitative descriptive analysis. In general, quantitative data analysis involves three steps: observation, interviews, and documentation. This research was conducted at the Guyub Rukun Tofu Factory in Lowokwaru District, Malang City in June 2025. The results of this study are the raw material inventory control system implemented by the Guyub Rukun Tofu Factory in Malang City, the Guyub Rukun Tofu Factory implements a routine inventory control system and is based on daily operational experience, where every day the main raw material is purchased, namely soybeans, as much as 200 kg according to the daily production capacity. The application of the material requirement planning (MRP) method in planning raw material requirements at the Guyub Rukun tofu factory based on EOQ calculations, with an ordering cost of IDR 40,000 per order and a storage cost of IDR 717,000 per kg per year, obtained an optimal order size of around 818 kg per order. Thus, the effectiveness of the material requirements planning (MPR) method compared to the inventory control policies currently implemented by the Guyub Rukun Tofu factory.

References

Authored Book

Akande, O. (2019). An Integrated Approach To Production Planning and Control Systems In Small Scale Industry. Southern Illinois University at Edwardsville.

Begum, S., Akash, M. A. S., Khan, M. S., & Bhuiyan, M. R. (2024). A framework for lean manufacturing implementation in the textile industry: A research study. International Journal of Science and Engineering, 1(04), 17-31.

Gisi, P. J. (2025). Effective Manufacturing Consulting: Strategies for Success in a Dynamic Industry. Florida, USA : CRC Press.

Gopalakrishnan, P., & Haleem, A. (2015). Handbook of materials management. India : PHI Learning Pvt. Ltd.

Muller, M. (2019). Essentials of inventory management. Tennessee, USA : HarperCollins Leadership.

Dissertation from a Database

Ihme, M. (2015). Interpreting and applying demand driven MRP: a case study (Doctoral dissertation, Nottingham Trent University).

Zhong, L. (2022). Competing on digitalization transformation: The relationship between enterprise resource planning, management control systems, and dynamic capabilities (Doctoral dissertation, Cardiff University).

Journal Articles

Adeniran, I. A., Efunniyi, C. P., Osundare, O. S., & Abhulimen, A. O. (2024). Optimizing logistics and supply chain management through advanced analytics: Insights from industries. Engineering Science & Technology Journal, 5(8).

Akinlabi, B. H. (2021). Effect of inventory management practices on operational performance of flour milling companies in Nigeria. International Academy Journal of Management, Marketing and Entrepreneurial Studies, 8(2), 137-174.

Farhan, T., & Purnomo, A. (2025). Analysis of Soybean Raw Material Inventory Control for Production Sustainability at a Tofu Factory in Padang Cermin District, Pesawaran Regency. Journal of Business and Halal Industry, 2(3), 7-7.

Haryadi, D., & Bramasto, A. (2023). Study of Inventory Control and Quality Control of Raw Materials. Almana: Jurnal Manajemen dan Bisnis, 7(3), 613-621.

Miclo, R., Lauras, M., Fontanili, F., Lamothe, J., & Melnyk, S. A. (2019). Demand Driven MRP: assessment of a new approach to materials management. International Journal of Production Research, 57(1), 166-181.

Ogbuagu, O. O., Mbata, A. O., Balogun, O. D., Oladapo, O., Ojo, O. O., & Muonde, M. (2023). Quality assurance in pharmaceutical manufacturing: Bridging the gap between regulations, supply chain, and innovations. International Journal of Multidisciplinary Research and Growth Evaluation, 4(1), 823-831.

Olaniyi, O. A., & Pugal, P. S. (2024). Optimising inventory management strategies for cost reduction in supply chains: A systematic review. Jurnal Akuntansi dan Bisnis: Jurnal Program Studi Akuntansi, 10(1), 48-55.

Oteri, O. J., Onukwulu, E. C., Igwe, A. N., Ewim, C. P. M., Ibeh, A. I., & Sobowale, A. (2023). Cost optimization in logistics product management: strategies for operational efficiency and profitability. International Journal of Business and Management. Forthcoming.

Ramadan, A., Alkhodary, D., Alnawaiseh, M., Jebreen, K., Morshed, A., & Ahmad, A. B. (2024). Managerial competence and inventory management in SME financial performance: A Hungarian perspective. Journal of Statistics Applications & Probability, 13(3), 859-870.

Saputra, W. S., Ernawati, R., & Wulansari, W. A. (2021). Analysis of Raw Material Inventory Control Using Economic Order Quantity (EOQ) Method at CV. XYZ. International Journal of Computer and Information System, 2(3), 118-124.

Siregar, A. (2022). Analysis Of Inventory Planning For Brick Raw Materials Using The Material Requitment Planning (Mrp) Method. JOEL: Journal of Educational and Language Research, 1(7), 965-972.

Stüve, D., Van Der Meer, R., Ali Agha, M. S., & Lütke Entrup, M. (2025). Supply chain planning in the food industry:

mixed methods research on the adoption of advanced planning systems. Production Planning & Control, 1-30.

Tanaga, M. B., & Oetama, R. S. (2023). Material requirement planning information system: Prototype and lead time analysis. Journal of information systems and informatics, 5(3), 848-859.

Vaka, D. K. (2024). Integrating inventory management and distribution: A holistic supply chain strategy. the International Journal of Managing Value and Supply Chains, 15(2), 13-23.

Xu, G., Guan, Z., Yue, L., & Mumtaz, J. (2023). An efficient production planning approach based demand driven MRP under resource constraints. International Journal of Industrial Engineering Computations, 14(3), 451-466.

Proceedings

Christifan, A. J., & Gozali, L. (2020, December). Application of MRP system for control of raw material inventory with EOQ lot sizing. In IOP Conference Series: Materials Science and Engineering (Vol. 1007, No. 1, p. 012029). IOP Publishing.

C

itraresmi, A. D. P., & Azizah, F. (2019, February). Inventory control of raw material on sweet bread production. In IOP Conference Series: Earth and Environmental Science (Vol. 230, No. 1, p. 012056). IOP Publishing.

Girsang, A. S., & Purwanto, A. (2017). Controlling system for stock raw material for production planning and inventory control in a pharmacy company. Int. Rev. Mech. Eng, 11(11), 855-861.

Hasanati, N., Permatasari, E., Nurhasanah, N., & Hidayat, S. (2019, May). Implementation of material requirement planning (MRP) on raw material order planning system for garment industry. In IOP Conference Series: Materials Science and Engineering (Vol. 528, No. 1, p. 012064). IOP Publishing.

Susanto, R. (2018, August). Raw material inventory control analysis with economic order quantity method. In IOP Conference Series: Materials Science and Engineering (Vol. 407, No. 1, p. 012070). IOP Publishing.