@polotek@social.polotek.net as a product manager, that's more or less what I do with my team: * plan a piece of work that looks like it should fit in a quarter based on what we did the quarter before, * break the effort down into stories, in a collaborative way with the dev team so they can give an estimate for each story, * review total estimate against total of previous quarter and adjust scope if necessary, * prioritise leftover scope as stretch goals.