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Product development is performed by proficient designers, who make their best effort to understand customer needs and desires via verbal or written interview. This approach becomes cumbersome if a product design undergoes revolutionary changes. In this paper, potential of real-time simulation models based on Multibody System Dynamics are utilized as a tool to interpret customers' needs. The complete real-time simulation model can be considered as interaction of several subsystems which are environment, work process, mechanics, actuators, control system and user input. A mechanical subsystem based on the use of multibody system dynamics includes modeling of mechanical bodies, force elements acting between bodies, joints connecting bodies, and contacts. In this way, three main area of applications are introduced consistently. Firstly, benefits of the process is discussed in Research and Development and Product Development domain. Latter comes R&D service business part and eventually authors investigate effect of the approach in marketing and sales.