The events are reported as successive but the earlier ones are purposefully leading to the later one.
or
"A sequence of preparatory actions (the steps) that the speaker presents as intentionally leading up to and culminating in a final, goal-oriented action."
As in English, the causal overlay is implicit and unmarked. Kovol also seems to do it implicitly, using the same pattern as for Sequential.
There are possibly constraints
Medium
Neither Steve nor Philip noticed anything significant in DA for step-goal. Purpose may be implied to a sequence of events based on an implicit assumption that earlier events lead to the final verb.