So as to design reconfigurable sociotechnical system, there is a need to check the control/monitoring system meets the end-user needs and requirements, as soon as possible. The use of simulation techniques allows the functional/behavior checking, in early design stages. However, it demands to model the requirements in the context, according to the sociotechnical and reconfigurable features. Therefore, we propose a multi-level requirements modeling and discuss its use, in the case of the design of a ship auxiliary fluid management system.