Though Enterprise Architecture (EA) is getting increasing attentions from both academics and practitioners, EA research around EA success factors remains modest and immature. This study explores how EA formative critical success facets/factors would affect the achievement of EA success. This research highlights the importance of four mediators, i.e., (I) Real and mature business needs; (II) Real and continuous commitment; (III) Actionable EA programs; and (IV) Well-controlled execution of EA programs. This study deepens our understanding of EA success and would be of explanatory contribution to EA value development and action-guiding contribution to EA adoption and implementation.