A project is utilizing a third-party contractor. A member of the contractor's team raises an issue with a member of the project team. The two individuals are not able to work out a solution. The project manager is aware of the disagreement.

Which type of communication should the project manager use first when contacting the vendor about this issue? Select one.

Question 1 options:

	Contractual letter
	Face-to-face
	Phone
	Email