Community health centres (CHCs) in Uganda play a crucial role in providing primary healthcare services to underserved populations. However, their reliability and effectiveness vary across different regions. A mixed-method approach was employed, combining quantitative data from surveys with qualitative insights through interviews and focus groups. The study utilised a stratified random sampling method to select participants across different regions. The analysis revealed significant variations in service delivery reliability among CHCs, with some centres consistently performing at an average level while others showed high variability in service provision. This evaluation highlights the need for targeted interventions and resource allocation to enhance system reliability in CHCs across Uganda. Public health authorities should prioritise capacity building programmes specifically tailored to improve service delivery consistency within CHCs. Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.