稳定性分析的表格

各位，有没有稳定性分析的表格可以分享一下？:)
具体分析方法如下：

1. Obtain a sample and establish its reference value(s) relative to a traceable standard. If one is not available, select a production part that falls in the midrange of the production measurements and designate it as the master sample for stability analysis. (Reference samples may be obtained from the low end or high end if applicable or desired).

获得一个样品并建立其可追溯到相关标准的参考值。如果不能得到这样的样件， 可以选取一件落在生产测量范围中间的生产零件为稳定性分析的基准样件（如适用或希望时，参考样本也可从上限，下限位置选取）。

1. Measure the reference sample 5 times / day and collect 2 weeks data continuously. Measurement times and schedules may be changed based on engineering judgment with regard to gage use frequency, calibration interval, repair times, environment etc.

连续2周每天测量参考样本5次。测量时间和周期可以根据工程判断或量具的使用频率，校正周期，维修时间，环境等调整。



3 Plot the data on Xbar / R control charts, Calculate control limit. (Refer to attachment for Control chart form)

获得的数据填入Xbar /R控制图表内，计算控制限。（控制图表参考附件）



4 Make a judgment using stability judgment standard of control chart, the measurement system is considered as unstable when one of the following conditions happen：

用控制图表做稳定性判断，有下列情况发生时，测量系统被认为不稳定：

A. Any one point outside the Upper or Lower Control Limits.

任一点超出上限或下限控制。

B. Chain 链

Seven or more successive points steadily increasing or decreasing

连续七点或更多连续上升或下降

Seven or more successive points within the same side of control central line.

连续七点或更多点在控制中心线的同一侧。

C. Obvious non-random figure

Obvious less than 2/3 point within 1/3 area of control limit

显著少于2/3以上的点落在控制限1/3 区域

Obvious more than 2/3 point within 1/3 area of control limit

显著超过2/3以上的点落在控制限1/3 区域

D. The following are possible reasons for unstable measurement system：

下列是情况可能测量系统不稳定的原因：

• Instrument need calibration, reduce calibration period.

仪器需要校正，缩短校正周期。

• Instruments, equipment and jig wear out

仪器，设备，夹具的磨损

• Normal aging or damage

正常的老化或损坏

• Poor maintenance –air, power, liquid, filter, corrosion, dust, clean

保养不好–空气，动力，液体，过滤器，腐蚀，灰尘，清洁等

• Standard wear out or damage, standard error

基准磨损或损坏，基准误差

• Improper calibration or use of standard set

不适当的校准或使用基准设定

• Poor instrument quality –design or conformance

设备质量不好–设计或符合性

• Lack of robust instrument design or method

仪器稳健的设计或方法

• Different measurement method –preparation, load in, clamp, skill.

不同的测量方法–作业准备，载入， 夹紧，技巧

• Distortion (gage or part)

变形（量具或零件）

• Environment –temperature, humidity, shake, clean

环境–温度，湿度， 震动， 清洁等

• Wrong suppose, wrong constant applied

错误假设，错误常数的使用

• Application –part quantity, position, operator skill, tire, observation error (legibility, parallax)

应用– 零件的数量， 位置， 操作者的技术，疲劳，观测错误（易读性，视差）