In an Integration Procedure, an OmniStudio Developer needs to perform a multi-step calculation on every...

The best design is to combine a Loop Block with calculation-oriented actions. A Loop Block iterates over each item in a data array, allowing the actions inside the block to repeat for every element. A Set Values element inside the loop can set intermediate values, reshape nodes , or apply simple formulas per array item. For more complex, multi-step calculation logic, an Expression Set Action is appropriate because it invokes a configured Expression Set and returns calculated results to the Integration Procedure. A Decision Matrix is mainly for table-driven decision lookups, not general multi-step per-item calculation. A List Action can merge or manipulate lists, but it does not perform the required calculation on every array element.