Comment Re:Transparency (Score 1) 220
That is why you use Statistical Process Control. I used to build assembly equipment and many tolerances were controlled by statistics. For eample say you had a certain diameter on a part that needed to be within tolerances. The first thing you do is take data on random parts to make sure all you have are random variations. If there is anything non-random you need to fix it. Then you set your control limits such that your process with your required degree of certainty is within it. So if you need the part to be from