论文部分内容阅读
1前言当前在比较专业的安全防范系统工程项目招标时,在系统性能指标上都提到了可靠性(Reliability)、可用性(Availability)及可维护性(Maintainability)的具体指标,简称为RAM。例如招标文件要求:闭路电视监视系统的可用性应不小于99.99%、闭路电视监视系统的平均维护时间(MTTR)应不多于5小时、平均无故障时间MTBF大于5000小时的招标要求。
1 Preface At present, in the relatively professional security system engineering project bidding, the system performance indicators are referred to the reliability (Reliability), Availability (Availability) and maintainability (Maintainability) of the specific indicators, referred to as RAM. For example, the bidding documents require that the availability of the CCTV surveillance system should be not less than 99.99%, the MTTR of the CCTV surveillance system should be no more than 5 hours, and the MTBF MTBF requirement of more than 5000 hours.