Service Oriented Computing (SOC) has gained maturity and there have been various specifications and frameworks for realization of SOC. One such specification is the Service Component Architecture (SCA), which defines applications as assembly of heterogeneous components. However, such assembly is defined once and remains static for fixed components throughout the application life-cycle. To address this problem, we propose an approach for dynamic selection of components in SCA, based on functional semantic matching and non-functional strategic matching using policy descriptions in SCA. The architecture of our initial system is also discussed