Methodological Evaluation of Manufacturing Systems Yield Improvement in Nigerian Plants Using Difference-in-Differences Approach
Key Points
To evaluate yield improvement in Nigerian manufacturing plants after implementing advanced systems using a difference-in-differences approach.
Employed a difference-in-differences (DiD) approach to analyze pre- and post-intervention yields.
Accounted for confounders such as industry trends and economic conditions.
Applied a yield model incorporating heteroskedasticity-consistent errors.
Observed a significant 15% yield improvement in plants using advanced manufacturing systems.
Confidence interval for yield improvement ranged from 7.2% to 23.8%.
Evidence supports substantial benefits of implementing advanced manufacturing strategies.
Abstract
Manufacturing systems in Nigerian plants have experienced varying degrees of yield improvement due to implementation of different strategies. A DiD approach was employed to compare pre- and post-intervention yields, accounting for potential confounders such as industry trends and economic conditions. The application of the DiD model revealed a significant 15% yield improvement in plants implementing advanced manufacturing systems compared to those without improvements (95% confidence interval: 7. 2-23. 8%). Advanced manufacturing systems led to substantial yield improvements, with clear evidence from the DiD analysis. Further studies should explore long-term sustainability and scalability of these systems in diverse Nigerian contexts. The maintenance outcome was modelled as Y₈ₓ=₀+₁X₈ₓ+uᵢ+₈ₓ, with robustness checked using heteroskedasticity-consistent errors.