The purpose of this paper is to ensure and maintain the alignment between business modeling and requirement elicitation. To do this, we propose an approach that combines the strengths of traceability and model transformations to bridge the gap between BPMN model and the UML use Case models in particular, we propose an intermediate integrated model (BPSUC), and bidirectional transformation rules between the use case and BPMN models into the BPSUC and vice versa. We have implemented an editor to design and visualize BPSUC, and ATL transformation rules to carry out transformation and have successfully tested our approach on a case study, and evaluation criteria. The engineers and the business design can use BPSUC to work together in a single integrated diagram as well as they can synchronize their initial model through the bidirectional model transformations.