Factorial Array

Edit factorial array

Rename Levels of DOE Factors

Interactions

Adding repetitions

Block Levels

Sort data in subgroups

Anova DOE

Confirmation run

Response graphs

Response surface methodology

For commercial use

75 EURO

A interaction is when the result is not the sum of two factors. With an interaction it can occur that the result of the to factors is lower or higher as the sum of the result.

When using an Orthogonal array interactions are not included. The interactions have to be included in the array this can be calculated with Develve.

Be careful with adding interactions in a design:

- A interaction is not a common thing
- Adding interactions will increase the array size especially in a 3 level array (2 extra test runs)
- If it is not logic that an interaction between factors do not include it

Interaction with the typical crossing line | No interaction |

For the interaction Dialog go to DOE=>Interactions

This Dialog is for selecting interaction that needs to be calculated in a Design of Experiment.

Data file

The Matrix indicates that Column C (pink means error) can not be used because that it is be used by the interaction. A bigger orthogonal matrix is needed. The indication of errors in the array is only been displayed when the check-box

With a bigger matrix it is possible to calculate the interaction.

The not used Columns can be removed. This is the result with measure data.

There is a interaction between Size and Weight and no interaction between Size and Color.

Adding a extra interaction between D and G the interaction dialogue will indicate that there is an error because both interactions interact with each other.

- http://www.itl.nist.gov/div898/handbook/pri/section6/pri623.htm
- http://en.wikipedia.org/wiki/Interaction_%28statistics%29