凡事就怕您较真！关于缺陷的定义

实在是要疯了，
遇到一国际知名客户，向我们采购织带（要求非常高，类似于挂工作证的那条带子），
客户一定要把织带的长度定义为CR，我们觉得不合理，
试想，
每次交几十万条带子600mm+-10（很难做到，大家都知道那带子是软的），若有一条就要批退，那不是要死人？。。。
双方大战了800回合，还是未谈拢。
兄弟们，请大家群策群力，帮我列出真正的有说服力的理由：
为什么织带的长度不能定义为CR？感激！！！

客户已经说了，尺寸超标会危及用户生命。。。可我怎么也不认为600mm的带子超那么一点我会致命？
------------------------------------------------------------------------

看大家讨论的这么激烈，非常感谢。在此，我针对大家的问题作如下补充说明：
1、关于缺陷的定义（CR、MAJ、MIN）这个是有国际标准和国家标标准的，但属“指导、参考性文件”
2、这个问题处理的难点就在于价格与品质的平衡。若不考虑价格，那么就没有做不出来的东西。探月工程不也实现了嘛。
3、这是一个传统行业，应属于纺织行业的细分。
4、织物是有弹性的。
5、当前，对于长度的CUT有两种方法：全自动机器和人工半自动
6、因织带上有印字。了解织带生产的会知道，一般工人是在裁切前（长达几十米）的带字上印字，然后再裁切。因对每条带子上的文字的位置有要求，而每次的人手裁切又会有误判，虽然这种误差很小，但都会累计，到也就是说，文字位置的偏差会越来越大。这一点很关键，不知道大家能否理解。
7、上面说的600实际是是850，是我书写错误，也就意味着，不能超过1/85的误差。（你找根一米的布带试试就知道了。
8、最关系键的一点，价格，因是大量重复性的人工活儿，工人的一个动作的改变直接影响到工厂的利润高低！！！

最后，我这样回了客户一封邮件：

Hi ***,

According to the document customer provided , the failure mode Lanyard too long will lead to death or hurt because of stopping extubation
I think we need a quantitative standard so that we can make a corresponding quality control method which is called a effective FMEA item

I'd like to let you know the reason why we considered it major but not critical:

1. Inherent characteristic of material ( Our chief engineer Mr. ***is trying to look up some material spec. for your reference)

Many external factor may impact the length of this kind of fabric product such as temperature, humidity, stretch, tension attenuation of material
We can guarantee the manufacturing process, but we cannot control the temperature, humidity, or pressing etc, during the transportation.

1. Measurement technique for this kind of fabric products

The length is measured under natural status ,just was put on a table , no any stretch
So any external factor as above may impact the length.

1. Specification requirement

The length is required within 850+/-10mm
To be honest, it is a strict specification for this kind of narrow and short fabric cord
As there are hundred thousands of lanyard per shipment and any external factor may cause the length change a little.

In a word, this is a fabric goods, not a hardware or mechanical part, the Length tolerance requirement is very strict, moreover, there are so many factors out of our control, so we can't accept the whole LOT goods were rejected and returned due to 1pcs out of spec. ( CR)

Please kindly understand it means e-Bi will take very high risk on this project ,

I suppose the lanyard out of spec 1 or 2cm may not cause the catastrophic , but too long will be a problem
So I'd like to suggest to define the "too long" , how much length out of spec will cause people hurt or death? it will helpful for our production control and solving the catastrophic

For example:
Major: 850+ /-10mm
CR : <(850+ /-50mm)<

Hope it can help you to understand why we couldn’t accept the length issue is CR.