Waiting Line Effects in Analytical Maintenance Float Policy
研究了设备故障分布对维修待机策略的影响，通过测试发现当故障分布为正态或均匀时，分析模型与模拟结果无显著差异，可简化使用。
ABSTRACT The equipment failure distributions commonly identified in practice pose great difficulties in the establishment of sound maintenance total float policy. Some of the existing analytical constructs utilize the reliability ratio of the equipment in operations in order to bypass the obstacles and arrive at applicable solutions. In this paper we give a summary of these theoretical models. In addition, we provide insight by testing the significance of factors utilized in maintenance total float determination. The paper examines the effect of the assumption made by the analytical model of no waiting time for repair. Our test showed that there is no statistically significant difference between the analytical model and simulation when waiting is allowed for the normal and uniform distributions. The analytical model thus offers some advantage in its use to estimate maintenance float due to its simplicity. When failure distribution is an exponential, Erlang‐2 or lognormal, the assumption of no waiting time for repair must be kept in order to use the analytical model.