Abstract: The hybrid model is introduced to enhance the response speed of users' operations in dynamic collaboration. The centralized object register helps to maintain the state of shared object groups, while the replicated shared objects are executed with optimistic serialized transaction handling. The new optimistic concurrency control and consistency maintenance methods are applied. Transformation of operational position is integrated into the two-phase commitment in the composite shared objects. The replicated object groups are dynamically maintained and the requirement for the dynamic collaboration establishment is satisfied.