Note—A Note on Computing Periodic Inspection Policies
针对需要定期检查的系统，提出一种新的近似方法计算最优检查间隔，该方法计算简单且成本接近最优（通常误差在1%以内），对运筹学和经济学研究者有参考价值。
Certain systems must be inspected in order to discover failures that would otherwise go undetected. Periodic inspection is the most commonly used inspection policy and is the optimal policy form for some inspection models. Determining the optimal periodic inspection interval, however, would involve a numerical search and require knowledge of the underlying failure distribution. This note examines the cost performance of an existing simple approximation of the optimal inspection interval and presents a new approximation. The new approximation is computationally simple, and outperforms the existing approximation. The new approximation yields expected total costs that are typically well within one percent of optimal.