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• What is the correct way to specify a DOE factor that is a discrete numerical variable?

  I was trying to duplicate an analysis in a paper by Christopher Nachtsheim and @bradleyjones called Split-Plot Designs: What, Why, and How, Journal of Quality Technology, Vol. 41, No. 4, October 2009. They use the Box et al data for studying the corrosion resistance of steel bars (attached image). In a split-plot design, Temp is treated as a hard-to-change (whole plot) factor with three levels: 36...

  gchesterton

  Discussions |

  Oct 9, 2020 5:08 AM

  6119 views | 5 replies

• Which alias terms to include in fit model

  Good Day I have performed a main effects screening design experiment to determine which of my factors have the most significant effect on the mechanical properties of a material. My factors were: L -> 5 level discrete numericR -> 2 level categoricalS -> 2 level categoricalT -> 2 level categorical I used the default number of runs and added one replicate run as this was suggested by a colleague and...

  Frances94

  Discussions |

  Oct 1, 2020 7:18 AM

  4767 views | 7 replies

• How to reset view of diagram after zooming in?

  How do I reset the diagram to original size after zooming in on a chart or dendogram? I realised there is no button to reset the view of the diagram to the original size after zooming in. This is very annoying because using the Ctrl button + mouse scroll to zoom out usually does not reset the diagram to the original size. The diagram gets skewed and distorted as a result and I have to run the whol...

  SassyJumper

  Discussions |

  Sep 30, 2020 3:29 AM

  3145 views | 1 replies

• Which design to choose

  Dear All,I am planning to build an RSM to optimize my method. I have 8 continuous factors and 2 responses. The levels of each factor were determined according to some internal methods and previous experiences of the team. I have no idea if there are interactions between factors or not. I can not identify the source of noise and I am planning to randomizeAfter a small research, I think they are two...

  ELH

  Discussions |

  Sep 28, 2020 6:34 AM

  8959 views | 13 replies

• Fractional Factorial - Understanding Aliasing Matrix

      Hi all, I would like to design a fractional factorial design. There are 4 factors.I could afford only max 12 run, including 4 center points.The highlighted 8 runs with resolution 4 is chosen.  Now, come to the question. In terms of aliasing, the factor "GPN time" is known to have less significant impact. Therefore, the factor "GPN time" is afford to be aliased.  Above is the aliasing of effect...

  AmirSS

  Discussions |

  Sep 25, 2020 6:58 AM

  3152 views | 3 replies