https://community.jmp.com/t5/Discussions/Trend-robust-mixture-experiments/m-p/636275#M83436 Yes Sat, 27 May 2023 20:01:52 GMT Fs2001 2023-05-27T20:01:52Z https://community.jmp.com/t5/Discussions/Trend-robust-mixture-experiments/m-p/634850#M83297 <P>With JMP, i have made a D-optimal Design for an experiment with 14 runs in the presence of such a time trend, for a special cubic scheffé model (third-order model) but without interaction between the time trend an the mixture ingredient factors.</P><P>&nbsp;</P><P>Based on the insights I acquired, I have to construct a second trend-robust D-optimal design and explain the principle I applied.</P><P>I suggest that I have to find a trend-robust D-optimal design that better fits the data, but no idea how to do that.</P><P>&nbsp;</P><P>Can anyone help me?</P> Wed, 24 May 2023 13:20:46 GMT https://community.jmp.com/t5/Discussions/Trend-robust-mixture-experiments/m-p/634850#M83297 Fs2001 2023-05-24T13:20:46Z https://community.jmp.com/t5/Discussions/Trend-robust-mixture-experiments/m-p/635067#M83326 <P>Is this problem in your homework for a course?</P> Wed, 24 May 2023 18:55:33 GMT https://community.jmp.com/t5/Discussions/Trend-robust-mixture-experiments/m-p/635067#M83326 Mark_Bailey 2023-05-24T18:55:33Z https://community.jmp.com/t5/Discussions/Trend-robust-mixture-experiments/m-p/636275#M83436 Yes Sat, 27 May 2023 20:01:52 GMT https://community.jmp.com/t5/Discussions/Trend-robust-mixture-experiments/m-p/636275#M83436 Fs2001 2023-05-27T20:01:52Z