Of all the evaluation designs I have presented, this is the weakest and any findings from using ONLY this design would need to be viewed with a lot of caution!
Some of the reasons this design is so weak at evaluating a project are: a) without a pre-test or baseline it is difficult to show that a change has occurred, b) if change did occur how much, and c) without a comparative group it is difficult to argue how much the project interventions were responsible for any of this change.
This type of evaluation design is best used only with very small projects, in rather isolated contexts, using and adhering to proven strategies and interventions, and including mixed methods (secondary data, key informant interviews, focus groups, etc.) to bolster the findings.
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