Every time we get into planning, the same questions emerge. “How much effort do you think this feature will take?” “How many people do you need to get this done?” And the truth is most of the time the answers are formulated on the back of a napkin ー or more likely, haphazardly in a Moleskine notebook. Really what we need is a simple calculator. Something that lets you add up the individual work items that contribute to an overarching product, identify the roles necessary to deliver that work, and have a way of reviewing your ability to fill your role needs with actual people. This doc represents a simplistic role-based headcount model that can be tailored to teams of one or teams of hundreds.