It is known that different process models are used during various phases of the Business Process Modeling (BPM) life cycle. Many efforts have been introduced to overcome the disintegration between these process models to provide a standard process model for design and execution. However this integration is still a problem that mazes the researches in this field till now. This paper discusses the problem of translation between process models, which known as the conceptual mismatch. Different perspectives are described considering the case of Business Process Modeling Notation (BPMN) vs. Business Process Execution Language (BPEL).