I do something similar and, depending on which group a given stakeholder falls into, determines how much effort I put into getting their input. For those in th

I do something similar and, depending on which group a given stakeholder falls into, determines how much effort I put into getting their input. For those in the 'agree' group I plan ahead to ensure I can get time with them 'in person' to discuss and debate the proposal in real time. For those in 'accept' I email/post the document and ask for comments/feedback by a specific, reasonable, deadline. If they're too busy to respond then they've forfeited any right to criticize, complain or block the proposal later on. If they provide feedback that I don't implement then I need to have good reasons why I'm not and share that with them. The 'understand' group tends to be upper mgmt who trust me and, so long as I've gotten everyone in the 'agree' group onboard, will support the decision/proposal. This is typically done in a regular 'check in' or via email.