Method for evaluating the optimal number of spare elements

摘要

Provided is a method for evaluating the optimum number of spare elements in a system that can obtain the optimum number of spare elements in a short time by a simple method. A method for evaluating the optimum number of spare elements is used to procure the number of lines having elements in common, the average operation time between elements, the work stoppage time required for replacement when an element fails, and the element. A first step of acquiring basic information including new procurement time, a second step of determining the upper and lower limit range of the system shortage stop time from the number of lines, the work stop time and the number of spare parts of the element, and the number of lines Analyzes the average outage stop time, which is the system stop time when there is no element to replace due to an element failure due to the upper and lower limits of the average failure operating time, number of spare parts, new procurement time, and missing part stop time And a fourth step of evaluating the optimum number of spare elements based on the basic information and the average shortage stop time. [Selection] Figure 9