Specify further information for Define Custom Response Surface Design

Stat > DOE > Response Surface > Define Custom Response Surface Design > Designs

You can specify the design columns that are already in the worksheet. If you do not have columns that contain the design information, then Minitab creates new columns.

Standard Order Column
If you do not specify a column, then Minitab creates a column that is the row order of the data. The standard order is also called the Yates' order.
  • Order of the data: Select this option if no standard order column is in the worksheet or if the standard order is the order in the worksheet.
  • Specify by column: Select this option if the worksheet contains a column that identifies the standard order of the experimental runs.
Run Order Column
If you do not specify a column, then Minitab creates a column that is the row order of the data.
  • Order of the data: Select this option if no run order column is in the worksheet or if the experimental runs are in the order that they should be done.
  • Specify by column: Select this option if a column in the worksheet identifies the order that the experimental runs should be done.
Point Type Column
To identify the type of point, Minitab uses a column that contains 0 in rows that are center points, 1 for cube points (corner points), −1 for axial points, and 2 for edge midpoints. If you do not specify a column, then Minitab creates a column with 1 in every row. You can directly edit this new column after you define the design.
  • Unknown: Select this option if no column with the correct format is in the worksheet.
  • Specify by column: Select this option if a column with the correct format is in the worksheet.
Blocks
If you specify a column with multiple values, Minitab can include a term for blocks in the model. If you do not specify a column, then Minitab creates a column with 1 in every row. You can directly edit this new column to identify blocks after you define the design
  • No blocks: Select this option if no block column is in the worksheet or if the design has no blocks.
  • Specify by column: Select this option if a column in the worksheet identifies which runs are in each block.
In this worksheet, these columns provide more information about the design:
  • StdOrder: This column contains the standard order of the runs.
  • RunOrder: This column contains the order that the experimental runs should be done. The order of the factor settings is randomized so the run order differs from the standard order.
  • PtType: This column identifies center points, cube points, and axial points.
  • Blocks: This column contains a 1 in every row because the design does not have blocks.
C1 C2 C3 C4 C5 C6
StdOrder RunOrder PtType Blocks Time Temperature
3 1 1 1 45.0000 200.000
10 2 0 1 37.5000 175.000
5 3 1 1 30.0000 200.000
13 4 −1 1 37.5000 139.645
4 5 −1 1 26.8934 175.000
6 6 −1 1 37.5000 210.355
9 7 1 1 30.0000 150.000
1 8 0 1 37.5000 175.000
8 9 −1 1 48.1066 175.000
7 10 0 1 37.5000 175.000
11 11 0 1 37.5000 175.000
2 12 0 1 37.5000 175.000
12 13 1 1 45.0000 150.000
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