I would like your input on how to get more cooperation from a colleague with a project.
Situation; My boss asked me to lead a project in collaboration with another department in december to be delivered in January.
Problem; One of the team member who reports to the other department encountered few difficulties with the supplier and informed us. However, since January, she is slow in responding and reports + do not cooperate to get into the deadline. I spoke to my boss about that after many tentative to get her cooperation. My boss sent her an email and offer is assistance if needed but still, nothing is coming from her. Since I do not have the "role power" and dont know her very well + these days most of our interaction is done via teams... it's kind of hard to get someone's cooperation. What would you suggest?