Manufacturing plants in Rwanda are critical for economic development, yet yield improvement remains a challenge. A quasi-experimental design was employed, including pre-and post-measurements on key indicators of yield. Data collection involved surveys and observational studies among selected plants. Significant improvement in yield was observed with a 20% increase in production efficiency across the sampled plants (95% confidence interval: [14%, 26%]). The quasi-experimental design successfully identified factors contributing to increased yields, providing actionable insights for plant managers. Further research should focus on replicating findings with a larger sample and exploring long-term sustainability of the observed improvements. Manufacturing systems, yield improvement, quasi-experimental design, Rwanda The empirical specification follows $Y=\beta_0+\beta^\top X+\varepsilon$, and inference is reported with uncertainty-aware statistical criteria.