What do you do when you're data is non-normal? Using Minitab here is one choice....
Here is a free D.M.A.I.C users guide – Click the link and download it now! https://paul-allen.mykajabi.com/dmaic-landing-page
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