Why Has PISA Become a Leading Framework for Competency-Based Assessment?

As international student assessment has evolved from curriculum-based knowledge testing to large-scale standardised comparison and, more recently, to competency-oriented evaluation, PISA has increasingly been regarded as a leading framework for competency-based assessment. Yet its representative status is often assumed rather than systematically explained. This article examines why PISA has become especially influential in contemporary educational evaluation and why it has come to symbolise a broader shift in assessment logic. Drawing on document analysis, comparative analysis, and theory-informed review, the article analyses the historical evolution of international student assessment, compares the distinctive orientations of TIMSS, PIRLS, and PISA, and interprets PISA through the lenses of competency-based assessment, educational equity, school effectiveness, and human capital and lifelong learning. The article finds that PISA became representative not simply because it is a large-scale international assessment, but because it redefined educational assessment in five important ways: by shifting the focus from knowledge acquisition to knowledge application; by embedding tasks in real-life or near-real-life contexts; by foregrounding transfer, problem solving, and cross-context performance; by operating through a framework not fully tied to any single national curriculum; and by linking student performance to broader questions of educational quality, equity, and policy learning. The article argues that PISA's significance lies not merely in international ranking, but in offering an internationally visible model of assessment aligned with competency, context, and development. At the same time, its policy relevance depends on careful local interpretation rather than direct policy borrowing.