A previous manager once told me how to deal with product managers: "You tell them what you need from them. Not the other way around." Don't let the PM write th

A previous manager once told me how to deal with product managers: "You tell them what you need from them. Not the other way around." Don't let the PM write the spec. They state the problem and you ask them questions to come to the solution. You also give them the timeline. If they don't like it, then cut features.