How did Joyce organize the fifteen stories in Dubliners?

by geographic location

by age of the narrators

by each central character's feeling of isolation

by each central character's choices and outcomes

How did Joyce organize the fifteen stories in Dubliners? He grouped the stories into childhood, adolescence and maturity to show how the experience of life changes as we age. For example, as we get older, we are less physically fit as when we are younger but also presumably more intelligent and wise so we don't have to exert ourselves so much.