Silent Grouping is one technique http://systemagility.com/2011/05/22/using-silent-grouping-to-size-user-stories/ http://systemagility.com/2011/05/22/using-silen

Silent Grouping is one technique http://systemagility.com/2011/05/22/using-silent-grouping-to-size-user-stories/ http://systemagility.com/2011/05/22/using-silent-grouping-to... Googling around that will find you some variant methods that I'm too lazy to dig out ;-) Ping me if you need more.