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A safety stock calculation method and system for equipment spare parts

A technology of safety stock and calculation method, applied in the field of safety stock calculation and system of equipment spare parts, can solve problems such as poor practicability and flexibility, and achieve the effect of reducing inventory cost pressure and reducing the risk of material shortages

Active Publication Date: 2019-01-29
HUNAN TALKWEB INFORMATION SYST
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Problems solved by technology

[0005] The invention patent with the publication number CN1416085 discloses a "safety inventory calculation device" [application number is CN01134503.9], which automatically calculates the safety inventory through the formula "safety inventory = daily average amount × safety days × adjustment coefficient" The safety stock of each commodity, in which the adjustment coefficient is set artificially, has poor practicability and flexibility

Method used

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  • A safety stock calculation method and system for equipment spare parts
  • A safety stock calculation method and system for equipment spare parts
  • A safety stock calculation method and system for equipment spare parts

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Embodiment 1

[0044] Such as Figure 1-2 , the method of this law is specifically described as follows:

[0045] (1) Firstly, based on a large amount of historical data recorded in maintenance and replacement parts, based on a flexible adjustable sliding window width (such as 7 days or 30 days, 5 days in this example), make more fine-grained sliding window statistics for each type of spare parts , to obtain the upper and lower limits and average value of the spare parts that need to be consumed in the specified time period;

[0046] (2) Based on the idea of ​​MTBF, calculate the time distribution rate characteristics of the comprehensive damage or failure of each type of spare parts in the whole life cycle; the calculation formula is as follows:

[0047] In the formula: t is the time interval of any replacement, let t 1 ,t 2 ,...,t n is the observed value of the replacement interval, and the order statistics of the replacement interval obtained from this group of observations are t(1)...

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Abstract

The invention discloses an equipment spare part safety stock calculating method and system. The method includes the following steps that step 1, historical spare part replacing records are calculated based on a sliding window method, and the distribution of life-cycle time length probability of each spare part is determined based on an MTBF algorithm; step 2, on the basis of the distribution of life-cycle time length probability of each spare part, the replacing probability of each spare part is calculated to determine whether the spare part needs to be replaced in the next period; and then all of the spare parts needed to be replaced in the next period are counted, and the total number is the safety stock k1. The equipment spare part safety stock calculating method and system are easy to implement, high in accuracy, and guarantee the equipment to run normally.

Description

technical field [0001] The invention relates to a method and system for calculating safety stock of equipment spare parts. Background technique [0002] Safety stock (also known as insurance stock) refers to the buffer stock prepared to prevent the impact of order demand due to uncertain factors (such as sudden large orders or supplier delays). Safety stock is used to meet lead time requirements. The calculation of safety stock generally requires the help of statistical knowledge, and the change of customer demand and the change of lead time are used as some basic assumptions, so that when the customer demand changes, the lead time changes, and both change simultaneously In each case, the respective safety stocks are calculated. That is, assuming that the customer's demand obeys a normal distribution, the maximum value of the demand is estimated through the set significance level, so as to determine a reasonable inventory. [0003] For the spare parts of the production equ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/08
Inventor 周训淼何毅唐红梅张亮胡宇航匡岳锋
Owner HUNAN TALKWEB INFORMATION SYST
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