For each key decision factor identified, you must analyze whether the key decision factor will display:
Each of these relay events to the case worker, as each change in value of an important piece of data (such as total household income) is a kind of event in itself - with the pattern that visually, reporting the new value of the data (such as $100) is enough information to communicate the event (since text for a named event such as "The total household income is now $100" could well be overly-wordy).
By contrast, events such as a person being born or dying are not changes in a single piece of data, and must be explicitly named events.