At first, for a given INTENT, we have a set of EXPECTATIONS. These are for the HAPPY path, that is : if everything goes fine. Given these EXPECTATIONS, we extrapolate the ACTIONS to take to fullfil them. For each of these ACTIONS, starting from the first in chronological order, we imagine all the possible SCENARIOS, good or bad. Then, for each BAD SCENARIO, we will have a new serie of EXPECTATIONS. For the HAPPY SCENARIO, we consider the ACTION is RESOLVED, and can follow with the next ACTION. We go through the same process over and over until all the ACTIONS in all the SCENARIOS are RESOLVED