Building the Design (Factorial Tab: 2-Level Factorial)
Choose New Design from the file menu
Select the lowest run design for the Number of Factors you want to study & enter the number of replicated Centre points (e.g., 2) you wish to run to establish the level of noise
Continue to enter the details of the factors and responses. Right click on the Block column of the resulting design and select Sort by Point Type. The repeated centre points will be the first rows in the layout
Leaving the centre point rows and the following two rows alone (reserve these for the mild and forcing conditions), highlight and delete the remaining rows
For the 2 rows reserved for the mild and forcing conditions, overwrite the cell entries in the design layout to the settings you want to run. Display the coded settings of -1 & +1 to help you edit the cell entries for the mild & forcing conditions
Overwrite the run order and then Sort by Run Order to create your preferred order (e.g., run centre points at the start and end of the study to pick up any time related bias)
Additionally, you can Insert a descriptive Categoric factor to label the results relating to mild, forcing and centre point conditions on subsequent plots to avoid misinterpreting factor effects
Warning: mild & forcing conditions in a scoping study are unlikely to both be included in the original fractionated design. To ensure they both appear follow the directions on the right to set up the design
Design Tip: you can always set up the scoping study in Excel & import it into Design Expert for analysis using the Historical Data feature
Run the Experiments and Enter the Data
The mild and forcing settings for the factors in the design layout are not always respectively the Low (L) and High (H) settings in the factor input dialogue
| Mild | Forcing | |||||
| Batch Size | L | H | ||||
| Liquid Volume | L | H | ||||
| Inlet Air Temp | L | H | ||||
| Spray Rate | L | H | ||||
| Screen Size | H | L | ||||
| Fluid Air Volume | L | H |
| return to contents |