ISO 9001 - SPC rules

Why does it say in ISO 9001 to use SPC where appropriate?? What a complete professional discrace! SPC is always appropriate!

Here is my buy me a coffee link.
https://www.buymeacoffee.com/osId2T0BL

Design of Experiments for 21st Century Engineers – Minitab version https://www.lulu.com/en/gb/shop/paul-allen/design-of-experiments-minitab-version/paperback/product-j8y6mp.html?page=1&pageSize=4

Drink tea and read the paper - https://www.lulu.com/en/us/shop/paul-allen/drink-tea-and-read-the-paper/paperback/product-1v474jqr.html

Видео ISO 9001 - SPC rules канала Paul Allen