Mixed-Design Approach in Impact Evaluation: Principles and Practice

There is no single method in impact evaluation that can always address the different aspects better than others. Importance of mixed design approach in impact evaluation studies arises with the need for attribution that cannot always be addressed through quantitative approach. 'Mixed-methods' is the combination of qualitative and quantitative approaches that help in outlining the causal chain and firming up a clear identification strategy in impact evaluation. When used in combination, both quantitative and qualitative data yield a more complete analysis, and they complement each other. Sometimes the evaluation design may emerge in new ways, depending on the conditions and information that is obtained during the study. The present paper discusses the application of mixed design approach in light of evaluation of Title II Safe Motherhood and Child Survival (SMCS) programme of Catholic Relief Services (CRS). The programme employed both the traditional quantitative and the qualitative methods to evaluate the impact of the intervention. Whereas the outcome level indicators were calculated using the quantitative methods, the strengthening of institutional and community level processes and sustainability linkages were derived at through qualitative tools.