Data may be acquired interactively during the execution of a process - usually via a Questionnaire mediated user interface.
By the time it is processed, the (situational) data should not differ depending on whether it was acquired from a data source or a human source. However, while data sources tend to have more data than needed, interactions may have to gather less data than ideal, to minimize user impact.
The details of the process integration (triggers, tasks) are also important, but discussed elsewhere (TBD).