Community health centres in Uganda face challenges in service delivery and efficiency. Panel data from multiple community health centres were analysed using a fixed effects regression model to measure yield improvements over time. Data show that patient wait times decreased by 15% after implementing new appointment scheduling systems, with an estimated effect size of -0.15 (95% CI: -0.23 to -0.06). The fixed effects model highlighted significant yield improvements in service efficiency. Immediate implementation of the new appointment scheduling system across all health centres is recommended for further yield improvement studies. Community Health Centres, Yield Improvement, Fixed Effects Regression, Appointment Scheduling Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.