Definition
How many runs an experiment needs
OVAT is valid only if the response is additive. In systems that is almost never true.
- Factors
- factors varied
- Levels
- levels per factor
Worked examples, recomputed
Every number the mechanisms quote for this relationship is recomputed from it, so none of them disagrees with it.
- 5 factors at 3 levels, one at a time → 11 runs
- full factorial → 243 runs
- a 2^(7−3) screen → 16 runs instead of 128
Where it appears
Each mechanism states it in its own names. The general symbol each name stands for is shown with it.
- Measurement & Experimental Method
What would have to be true for this number to mean what I think it means?