Hello JMP User Community,
I am seeking for some suggestions/guidelines to fit a Custom Screening DoE for main effects. Below is the screen shot of the model fitting. My thought process is to remove those factors with t ratio less than 2 one by one until all factors left with t ratio above 2 and then use those factors to conduct a Response Surface Design for more detailed investigation. I will also use my practical knowledge when eliminating factors. Here are some questions that I have:
1. is it safe to eliminate the factors with their t ratios less than 2? According to JMP, it is basically equivalent to p value of 0.05 although there is no p value available for this design. Assuming no practical knowledge about the impact of the factors on the response.
2. Any other methods should be used?
Thank you!
![JMP38401_0-1627580749294.png JMP38401_0-1627580749294.png](https://community.jmp.com/t5/image/serverpage/image-id/34642i8DDDDB369B869E31/image-size/medium?v=v2&px=400)