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• Why are DOE simulated values negative?

  I am struggling to find the reason of getting the negative numbers which comes from simulation in DOE. The input dataset has seven Cost Type variables (X) and response variable is Total Cost (Y). I have imputed the data in custom design (see screenshot “DEO Setup_1”). The Min and Max values of the variables are as follows. MinMaxCost Type 111.3118.91Cost Type 28.216.39Cost Type 38.317.88Cost Type ...

  madhu

  Discussions |

  Dec 26, 2024 11:04 AM

  5253 views | 7 replies

• How to evaluate Alias structures in D-optimal DOE?

  My understanding is that D-optimal designs can be good for screening experiments, but you'd better hope there aren't any large interaction effects, otherwise they will bias your main effects, or that you should add some suspected 2-way interactions to your optimal design as a way to avoid aliasing effects.  I've been told to avoid Res III fractional factorials, & Plackett-Burman designs for screen...

  mjz5448

  Discussions |

  Dec 25, 2024 7:56 AM

  2027 views | 5 replies

• DOE with covariate

  I have done some basic searching already, but can't find an example matching this scenario. Suppose I wanted to run a typical full or fractional 2-level factorial DOE but there was a covariate I wanted to account for. I was expecting that I could just go to custom design and add the factors and specify one of those as a covariate. It would make the table and fill in the +1 -1 as appropriate for th...

  awelsh

  Discussions |

  Dec 23, 2024 2:08 PM

  1670 views | 4 replies

• What is the Difference Between "Remove" and "Exclude" Effects in the Effects Summary Table?

  I have the following question: I am working with a fractional factorial design 2^(5−1), evaluating a single response, and adding a central point and a replicate to the effects. The goal is to determine if there are indications of curvature and if there is a difference between replicates, respectively. In the effect summary table, if I exclude the replicate effect and exclude curvature, the model d...

  leodu

  Discussions |

  Dec 23, 2024 1:37 AM

  941 views | 1 replies

• How to manage linked factors in DOE ?

  Hello everyone, I'm new in the community, sorry by advance if I post at the wrong place or if the question has been already answered. My issue concerned factors of DOE when they are not independant. In my example, it concerns the pressure step. For confidentiality reasons, I remove steps of the process and simplify the "recipes". Context :The DOE concerns the process in a reactor in a cocoa factor...

  JuliaL

  Discussions |

  Dec 20, 2024 6:02 AM

  2915 views | 6 replies