Ah, The "Wicked Bible" i.e. the1631 edition of the King James Bible where in Exodus 20:14 it mistakenly omitted the word "not," causing the commandment to read, "Thou shalt commit adultery".
Oh no!
Does this mean that the traditional newspaperman's hat will no longer fit?
For more on this important issue click here: The Wayback View – The pressman's hat
You don't need this step - delete it:
"1. i produce linear plate or print linear. read the gradation scale and measure the tone value increase."
Instead start by confirming the your print condition is consistent, and repeatable and free of mechanical issues like slur, doubling...
That should be framed and put on the wall in prepress.
You never assume what the customer's intent is. For example, I once received an invoice where the yellow text and background color had very little contrast which made the text extremely difficult to read.:
It was done on purpose because...
One of the reasons that the microscope can be a very valuable tool is that it can reveal problems that can otherwise be missed.
For example the dot doubling in the black in this plate/print comparison:
BTW did you rotate the images that you posted so that they appear to have the same screen angle?
Adding to Steve's post - ideally you will have a microscope that can take photos like this one:
They are inexpensive - usually much less than $100 on Amazon.
You can use it to compare the appearance of the dots on the plate against the dots on the press sheet at corresponding tone values...