HI,
I want to study the impact of tempertature and speed on the performance of the product.I want to see also their combined effect.
I want to look at three temperatures 120, 140, 160. And three speed 100.150,200. When i do a custom design. its not choosing the mid values. How can I include it. bcos the mid values are the most important ones.
Should i go for a screening design or response surface design. I cannot afford many runs. Can someone suggest a solution.
thanks in advance
