Data collection is a cornerstone of Monitoring and Evaluation (M&E), shaping the quality, reliability, and usefulness of evidence for decision-making in development programs. This article examines three main methodological traditions—quantitative, qualitative, and mixed methods—highlighting their respective strengths, limitations, and applications. Quantitative approaches, such as surveys and structured interviews, generate measurable insights, while qualitative techniques, including focus groups, case studies, and participatory tools, provide contextual depth. Mixed-methods designs integrate both, enabling holistic perspectives on program outcomes. The discussion also addresses technological innovations such as mobile surveys, GIS, and social media analytics, which have expanded possibilities for M&E, especially in low-resource contexts. Ethical considerations, including informed consent, privacy, and cultural sensitivity, are underscored as essential for responsible practice. The article concludes that effective data collection requires balancing rigor, ethics, and contextual adaptability, ensuring that M&E systems foster accountability, participation, and sustainable development outcomes.
Anna Neya Kazanskaia (Wed,) studied this question.
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