Abstract. Recently, the distributed real-time services are developing in distributed object computing environments in a way that can support a new programming paradigm of the distributed platform that requires interoperability among heterogeneous systems. These services are based on distributed middleware and object-oriented technologies. But we have the difficulties of managing of distributed objects and providing real-time objects with the timing constraints. For simultaneously solving these problems, we designed a new model, a real-time object group (RTOG) platform that can manage and group the distributed objects for reducing their own complicated managements and interfaces, and add distributed real-time requirements to real-time objects without modifying the ORB itself. The structure of the real-time object group we suggested contains several components reflecting the object grouping concepts and real-time service requirements analyzed by referring OMG CORBA specifications and rea...