3 ms·The Essential Roles No Ones Heard of in Agile Software Delivery2 points by ezy_ 7y agojava-man 7y agoVery clever, especially about The Bull Dog role. First four roles are essential, the rest may not be so.ezy_ 7y agoAgree - loosely ranked in order of importance. Team Whisperers are my favorite though. I hate being part of teams without them :)