Unexpected tasks can appear when an embedded system has been designed and is operating in a defined structure. In such a situation it is not possible to add any new component to the system. In some situations modification of the architecture is possible to be made but cost of such an operation can be very high and not economically justified. In such a situation some of unexpected tasks cannot be executed by the system. Cooperation of two or more embedded systems could possibly solve such a problem. Two or more cooperating embedded systems can even execute some tasks that cannot be executed separately by one individual system. Therefore we believe that that it is very important to provide methodologies to assign to a group of embedded systems unexpected tasks that cannot be executed separately by any system by itself.