How to arrange DOE → Approximation → Optimization in Process Composer?

Hello,

I am currently working with Process Composer to set up an optimization workflow.
The sequence I want to achieve is as follows:

  1. Parameter model (design variables)
  2. DOE (Design of Experiments / parameter study)
  3. Approximation model (RSM, surrogate model, etc.)
  4. Optimization

In other words, I want to use DOE to sample design variables, run simulations for those samples, build an approximation model, and finally perform optimization to obtain the best design.

However, when I try to build this in Process Composer, I run into some issues:

  • The Optimization block seems to exist independently and cannot be placed inside the DOE block.
  • As a result, the Optimization step cannot directly read the variables defined in DOE.

👉 My questions are:

  • What is the correct way to arrange DOE → Approximation → Optimization in Process Composer?
  • Do I need to expose or configure the DOE variables/outputs separately so that the Optimization can access them?
  • In practice, what is the recommended workflow setup for this sequence?

Any advice from those with experience would be greatly appreciated.

Thank you!

EX)