In Component-Based Development(CBD), by building new software with independently developed components, we can gain the benefits promised by the software reuse such as quality improvement and rapid development. Hence, methods to design the components in component-based system are very important and the component architecture should consist of highly cohesive components. Accordingly, to design highly cohesive components in component development phase, we propose new types of dynamic dependency relationship between classes and a component-based cohesion metric applying the properties of linear increment by dynamic dependency relationships between classes. In addition, we prove the theoretical soundness of the proposed metric by the axioms of briand et al. and suggest the accuracy and practicality of the proposed metric through a comparison with the conventional metrics.