In this way , in case any subsystem failure , general system can on - line maintain in stead of stopping to maintain , so other subsystems can keep working normally during the maintenance of the failure subsystem ; secondly the general system can quickly resume to normal work state with high quality within the common working permission time of integrating system in case of any system development or failure maintenance 当子系统出现故障时,并不需要以停止整个系统的工作为代价,在维护故障子系统期间,其它子系统仍然能够正常工作,独立的完成其自身的功能;其次在实现系统扩展或系统出现故障时,系统能够保持正常生产的许可条件下,力求高质量、迅速恢复正常的生产状态。