The project manager and contractor should review the vendor rules of engagement, which are the guidelines and expectations for the communication and interaction between the project team and the contractor. The vendor rules of engagement can help to prevent or resolve communication conflicts by clarifying the roles and responsibilities, the frequency and mode of communication, the escalation process, the feedback mechanism, and the performance evaluation criteria of the contractor. The vendor rules of engagement are usually part of the contract or the procurement management plan.

The vendor rules of engagement are different from the scope of work, which is the document that describes the work to be performed, the deliverables to be provided, and the acceptance criteria to be met by the contractor. The vendor rules of engagement are also different from the request for proposal, which is the document that solicits proposals from potential contractors by specifying the project requirements, evaluation criteria, and contract terms. The vendor rules of engagement are also different from the project schedule, which is the tool that displays the planned start and finish dates, durations, dependencies, and resources of the project activities and tasks. References = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 12: Procurement Management1; CompTIA Project+ Certification Study Guide, 3rd Edition, Chapter 12: Procurement Management2; Vendor Rules of Engagement3