NSPI National Society for Programmed Instruction 全国程序教学学会（美国） NSR Normal Service Request 正常服务请求 NSRDS National Standard Reference Data System 全国标准参考数据系统（美国标准局的） ..
At presenttheindex that used inevaluatingtransitnetworkservicelevelisnormalperformance index usually, it alreadycan't satisfytherequestofplanningandmanagement.