How can Jobs to Be Done be formulated from diary studies?

I'm trying to best ascertain the relationship between a diary study and "Jobs to Be Done".

It seems to me that diary studies are more direct, and Jobs to Be Done are stories based on memory of past events. So in fact, Jobs to Be Done could be constructed after the diary study, if I'm careful about what questions I ask participants during the study.

How might I try to get people to articulate their desired outcome statements during a study?