I don't do DOE's often/ever and wanted some help interpreting my results. I have concluded the following
a) Power/Seal time and Power/Shim height have no interactions. the rest do.
Here are my questions.
1) How can I rank the strength of the interactions? So far I would say
Pre Seal/Seal then a close call between Pre seal/Shim & Seal/Shim
and last Power/Pre Seal. Is this correct? Is there some metric in Minitab I can use to rank the interactions?
2) Does the position of the cross or the fact that they don't cross have any weight on the strength of the interaction? For example Pre seal/Shim & Seal/Shim. Pre seal/Shim crosses close to the -1 but Seal/Shim doesn't cross at all. Do you just look at the difference in slope?
3) Is there an idiots guide to DOE interpretation?