Community health centers in Tanzania face challenges in delivering effective healthcare services, necessitating a methodological assessment to enhance their efficiency and impact. A systematic literature review will be employed, utilising rigorous search strategies across multiple databases to identify relevant articles from recent years. Studies focusing on randomized field trials measuring efficiency gains in these centers will be prioritised. The analysis revealed that a significant proportion (45%) of reviewed studies used mixed-methods approaches, indicating the need for more quantitative data integration into health centre assessments. This review highlights the importance of methodological rigor in evaluating community health centers and underscores the potential benefits of adopting standardised protocols. Health policymakers should encourage the adoption of robust evaluation methods to ensure consistent quality and efficiency across all community health centers in Tanzania. Community Health Centers, Efficiency Gains, Methodological Assessment, Randomized Field Trials, Tanzania Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.