Response Surface Methodology Tutorial | Design, Analysis, and Optimization

[@artsnx10]

hello sir. hope ure doing fine. I wanted to ask something about R square value. Is it acceptable that i obtained predicted R square value of 0.5+ something but for R square and Adjusted R square its around 0.9+ ? Btw im doing an analysis to optimize FDM 3D Printing machine by studying the machine process settings with tensile test specimen strength. Hope you able to answer my question. Thank you.

[@DrHaffeast]

Actually value of R2 depends on application. If pure science 0.7 above is acceptable. If social science 0.5 is okay. You need to compared your work with similar published niche and if out of 10 papers 7 publish with R2 less than 0.5 then it is acceptable.

[@jjtravelandeats6610]

Hi sir, i have specific data, from 14 treatments (with different of concentrations in different times), can i use design expert to determine the optimization treatment from those 14 treatment based from the existing data? Just to conclude, i have existing data and want to know which treatment is the best . Thank you in advance

[@DrHaffeast]

Yes you can. But some experiment need to be done because not all 14 experiment you done will be tally with the software. The design also depends on which model that you choose.

[@SitiFatimah-c2b3m]

I am sorry, i still dont get it, why that number change and make anova who not significant to significant? I dont get it after the report table, i was try it but i dont get the same thing

[@jahidakhtar379]

What is no of cv cycle ? How increasing the no of cv cycle decreases the capacitance value in your data sheet. ?

[@rajasyafira2976]

can i know how to identify the optimal operating condition for my experiments when using this software?

[@DrHaffeast]

The optimum operation condition can be accessed on the optimization tab. Click the numerical and click solutions. Chose 1 solution and repeat a minimum of 3 times. And calculate the residual standard error.

[@rajasyafira2976]

​@@DrHaffeastthank you so much

[@jasminesagwal6127]

Lack fit value is missing in my design expert? Is it necessary to find out lack fit value

[@santhoshwodeyar1940]

Kindly share the link of software

[@DrHaffeast]

The sofware can be bought from shopee or lazada.