To solve a complex cooperative problem effectively

the reasonable allocation is very important.By allocating a cooperative problem to multiple entities based on optimization of the interaction relationship model

the interaction relationship number could shrink

which could decrease the interaction quantity

facilitate the management on cooperation

reduce the communication cost

and sequentially underlie the effective and high quality solving to a complex cooperative problem.Based on the definition of the intra-interaction and extra-interaction relationship

a mathematical model with target function on the minimization of the interaction relationship number is analyzed.With three proposed selection principles

a sequential optimized allocation algorithm is designed and implemented to provide a better solution of that mathematical model.Experiments prove that interaction relationship number allocated by this method is much less than other methods

which guarantees that the cooperative problem could be solved more effectively.