Parameter values VS Environmental Variables

[Brian.Osborne]

I'm curious what other people think on this.
What is the advantage of using one over the other for passing data between internal and external action calls.

I have an app I'm automating testing on that will have about 90 values that would have to be passed from action to action for input and validation, but each action run will only need a selection of maybe 15 of those values. How would people recomend getting those values into the other actions being called as needed?

Thanks for the input.

Brian