Tell
Make the decision. You might explain your motivation. No discussion.
Sell
Make the decision. Try to convince others and help them feel involved.
Consult
Ask for input, take input into considaration, then decide.
Agree
Discuss until you reach consensus.
Advise
Offer input, let others decide.
Inquire
Leave decision to others, then ask them to convince/inform you. It’s their decision.
Delegate
Leave decision completely to others. Don’t want to know anything about it.