Industry info 工业信息

Category:Logistics and warehousing

Question:
What is a bathtub curve? What is the significance?

Answer:
failure rate of most products change over time curve of the shape of tub, it will be known as the bathtub curve of failure rate curves. Product failure mechanisms are different, but the product failure rate changes with time can be roughly divided into three stages:

1) an early failure stage

put into use early in the product, product failure rates are relatively high, and there quickly drop characteristics.

2) occasional failure stage

the product in use for some time, the product failure rate can be reduced to a lower level, and basically in balance, you can approximate that the failure rate is constant, this stage is the occasional failure period.

3) depletion of fault phase

the product in use for quite some time, the products enter wear and tear failure period, characterized by a rapid increase in the product failure rate, and soon a large number of product failure or scrapped.

Chinese:什么是浴缸曲线？

类别: 物流与仓储

问题:
什么是浴缸曲线？有什么意义？

回答:
大多数产品的故障率随时间的变化曲线形似浴盆，故将故障率曲线称为浴盆曲线。产品故障机理虽然不同，但产品的故障率随时间的变化大致可分为三个阶段：

1）早期故障阶段

在产品投入使用的初期，产品的故障率较高，且存在迅速下降的特征。

2）偶然故障阶段

在产品投入使用一段时间后，产品的故障率可降到一个较低的水平，且基本处于平衡状态，可以近似认为故障率为常数，这一阶段就是偶然故障期。

3）耗损故障阶段

在产品投入使用相当长时间后，产品进入耗损故障期，其特点是产品的故障率迅速上升，很快出现大量的产品故障或报废。