This review focuses on the assessment of district hospital systems in Nigeria from to , a period critical for understanding healthcare delivery and system reliability. A systematic literature review approach was employed, including databases such as PubMed, Cochrane Library, and Google Scholar for papers published between and . Studies were selected based on their relevance to Bayesian hierarchical models applied to healthcare systems. Bayesian hierarchical models showed promise in estimating system reliability with significant uncertainty due to varying data quality across districts. A key theme was the need for standardised datasets to enhance model robustness. Despite methodological challenges, Bayesian hierarchical models provide a promising framework for assessing and improving district hospital systems in Nigeria. Further research should focus on developing consistent data collection methods and validating these models across different regions of Nigeria. Bayesian Hierarchical Models, District Hospitals, System Reliability, Healthcare Systems, Nigeria Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.