The advantages

Evaluation, during design phase, of all technical characteristics of the felt to be produced and of all the possible implications deriving from every adjustment made.
This way, often, a first felt supplied can perform better than standard ones.
The opinion of a big scientist:
"When you can measure and express what you are discussing about with numbers, you really know something; but when you are not able to express the object of your inquiry in numbers, your knowledge is unsatisfactory and your progress appears poor from a scientific point of view".
Williams Thomson (1824-1907) also known as Lord Kelvin