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How do I Use Boolean Logic on Continuous Factor to Create a DoE

Hello. Thank you in advance for your time to consider this problem.

I am trying to create a DoE with 2 continuous factors and a 2-Level discrete numeric factor.

I want to create a DoE in which if the discrete numeric factor value is 1, only range of values from the 1st continuous factor is experimented. And, if the discrete numeric factor value is 2, only range of values from the 2nd continuous factor is experimented.

How do I go about designing such experiment?

Thanks,

Charlie Roh

DOE

Re: How do I Use Boolean Logic on Continuous Factor to Create a DoE

Charlie, welcome to the community. It is very challenging when the situation is not understood from an engineering or scientific perspective. What model are you looking to provide insight into? Or, in other words, what effects are you trying to understand? One approach would be to nest the continuous variables inside the discrete factor. Apparently you are not interested in the interaction between the continuous variables. You mat be able to use Custom Design to add the terms you are interested in.

Re: How do I Use Boolean Logic on Continuous Factor to Create a DoE

Hi Statman,

I am afraid I can't go into much detail due to company policy.

I will try to come up with an example.

Let us say there are 2 pipes at a fixed inner diameter and a a male to male NPT connector that connects the 2 pipes together.

A compressible fluid goes through this fluid path.

The outer thread of the connector remains the same in order to connect the 2 pipes, but the inner diameter of the connector can vary (1/8, 1/4, 3/8 etc).

At different inner diameters of the connector, different ranges of flow rate are possible. The response would be pressure, velocity, Reynolds number in the connector and other values that characterize fluid flow. So the responses would not be nominal.

How do I relate the inner diameters of the connector to its range of flow rates?

Can you elaborate on the approach of nesting a continuous variable inside a discrete factor?