In the case of an ideal physical standard does not exist for your product, and so you cannot read this standard with your instrument or compare samples from your process with this standard. However, you do have a general product specification available such as the following:
X (C/2) must be between 75 and 85
Y (C/2) must be greater than 80
Z (C/2) must be less than 70.
We can use a data series to input these product specifications and then compare samples to it as if it were a standard.
(Download the pdf file below)