Inventory Management and Organisational Performance of Selected Manufacturing Firms in Southwest, Nigeria

This study examined the effect of inventory management on organisational performance of selected manufacturing firms in Southwest Nigeria. The study specifically investigated the effect of Economic Order Quantity (EOQ), and Order Interval (OI) on organisational performance. The increasing complexity of manufacturing operations, rising production costs, supply chain uncertainties, and the need for efficient resource utilisation have made effective inventory management a critical determinant of organisational competitiveness. The study adopted a descriptive survey research design. The population of the study comprised registered manufacturing firms operating in Lagos, Ogun, and Oyo States, Nigeria. According to the Manufacturers Association of Nigeria (MAN, 2024), the total population consisted of 1,078 registered manufacturing firms, comprising 566 firms in Lagos State, 305 firms in Ogun State, and 207 firms in Oyo State. Using the Taro Yamane sample size determination formula at a 5% level of precision, a sample size of 292 respondents was obtained. The study employed proportionate and simple random sampling techniques to ensure adequate representation of manufacturing firms across the selected states. Data were collected using a structured questionnaire titled Inventory Management and Organisational Performance Questionnaire (IMOPQ), which measured the study variables using a five-point Likert scale. The collected data were analysed using descriptive statistics and regression analysis, while diagnostic tests were conducted to establish the suitability of the data for inferential analysis. The findings revealed that Economic Order Quantity had a positive and statistically significant effect on organisational performance (β = 0.152, p = 0.002 < 0.05). Similarly, Order Interval was found to have a positive and significant effect on organisational performance (β = 0.276, p = 0.000 < 0.05). The study concluded that inventory management significantly influences organisational performance among selected manufacturing firms in Southwest Nigeria.

Inventory Management, Economic Order Quantity, Order Interval, Organisational Performance

1. Afrifa, G., Tauringana, V., & Tingbani, I. (2021). Abnormal inventory levels and manufacturing firm performance in the United Kingdom. International Journal of Production Economics, 231(1), 107–126. [Google Scholar] [Crossref]

2. Agu, O., Obi-Anike, H., & Eke, C. (2021). Inventory control practices and organisational productivity among manufacturing firms in Nigeria. African Journal of Business and Economic Research, 16(2), 133–152. [Google Scholar] [Crossref]

3. Anantadjaya, S., Nawangwulan, I., & Santoso, B. (2021). Inventory management and financial performance among manufacturing firms in Indonesia. Journal of Asian Business and Economic Studies, 28(3), 188–207. [Google Scholar] [Crossref]

4. Andersen, H., & Larsen, B. (2022). Inventory optimization strategies and operational performance among Norwegian manufacturing firms. European Journal of Logistics and Supply Chain Management, 10(2), 66–84. [Google Scholar] [Crossref]

5. Babatunde, A., Adetola, J., & Bello, K. (2025). Manufacturing performance and operational sustainability in Nigeria. Nigerian Journal of Industrial Economics, 14(2), 70–89. [Google Scholar] [Crossref]

6. Babatunde, A., Bello, T., Ajayi, M., & Balogun, R. (2025). Inventory management and firm performance nexus in listed manufacturing companies. Journal of Accounting and Financial Management, 11(3), 101–120. [Google Scholar] [Crossref]

7. Eze, C., Okafor, I., & Nwosu, B. (2022). Economic Order Quantity systems and inventory turnover among manufacturing firms in Nigeria. Nigerian Journal of Management Sciences, 21(3), 117–136. [Google Scholar] [Crossref]

8. Gara, M., & Adamu, K. (2026). Inventory-related inefficiencies and profitability of industrial goods firms in Nigeria. Journal of Industrial and Corporate Performance, 9(1), 52–70. [Google Scholar] [Crossref]

9. Goldratt, E. M. (1984). The goal: A process of ongoing improvement. North River Press. [Google Scholar] [Crossref]

10. Ilori, A., & Majiyagbe, K. (2024). Inventory control systems and operational efficiency of manufacturing firms in Southwest Nigeria. International Journal of Operations and Production Management, 9(1), 84–103. [Google Scholar] [Crossref]

11. Kwateng, K., Mensah, P., & Adu, G. (2022). Vendor Managed Inventory systems and operational performance in manufacturing industries. African Journal of Logistics and Operations Research, 8(2), 67–86. [Google Scholar] [Crossref]

12. Nuwagaba, J. P. (2024). Inventory management practices and operational performance within cement manufacturing firms in Kenya. East African Journal of Business and Management Studies, 9(3), 54–72. [Google Scholar] [Crossref]

13. Nwaiku, C., & Ejechi, E. (2022). Inventory management practices and organisational productivity among manufacturing firms in Nigeria. Journal of Contemporary Management Research, 8(2), 91–110. [Google Scholar] [Crossref]

14. Ogah, J., Asiegbu, I., & Moradeyo, A. (2022). Raw material inventory management and operational performance among manufacturing firms in Nigeria. Journal of Nigerian Industrial Economics, 12(4), 143–162. [Google Scholar] [Crossref]

15. Ogunleye, M., & Ibrahim, T. (2024). Organisational performance trends in Nigerian manufacturing firms. International Journal of Organisational Performance, 9(3), 58–77. [Google Scholar] [Crossref]

16. Okonkwo, A., & Ojo, B. (2023). Inventory practices and supply chain coordination in Nigerian manufacturing firms. Journal of Supply Chain and Production Economics, 12(4), 90–109. [Google Scholar] [Crossref]

17. Opoku, D. (2022). Inventory management strategies and operational flexibility in manufacturing firms. International Journal of Production and Operations Management, 17(3), 120–139. [Google Scholar] [Crossref]

18. Opoku, D., Mensah, K., & Boateng, P. (2021). Inventory management practices and operational performance among manufacturing firms in Ghana. African Journal of Operations and Supply Chain Management, 13(2), 88–107. [Google Scholar] [Crossref]

19. Oshiorenoya, A., & Faruq, K. (2025). Inventory monitoring and organisational performance among manufacturing firms in Nigeria. Journal of Operational Performance and Management, 13(1), 93–111. [Google Scholar] [Crossref]

20. Panigrahi, S., Rao, P., & Das, K. (2021). Effect of inventory management practices on the performance of manufacturing firms in India. International Journal of Supply Chain Management, 10(3), 91–110. [Google Scholar] [Crossref]

21. Shah, N., & Thegar, R. (2021). Inventory management techniques and organisational performance of manufacturing firms in the United Kingdom. International Journal of Business and Management Review, 9(4), 44–61. [Google Scholar] [Crossref]

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