my friend underestimates the time or effort that it will take her to do something. she says she will arrive shortly - it takes her close to an hour to get there. last weekend she arrived two hours late to only see its end. she doesn't plan her activities, but when she does she doesn't properly access how much effort and time these activities take up. she doesn't do this intentionally and feels upset herself with how it happens. some of our mutual friends get angry at her for it, I am more forgiving.
what types do this sort of thing?