A vendor was removed from a company due to non-performance but continues to submit invoices for work that was not completed. Which of the following should the project manager do to stop the vendor from sending invoices?

A project manager is unsure if the quality of a deliverable from a SME meets specifications.
Which of the following is the BEST way for the project manager to address the issue?

A project manager realizes there is a significant risk event. Which of the following is the FIRST step the project manager should perform?

A project has fallen behind schedule. Upon investigation, the project manager determines that team members have implemented requirements relayed via impromptu hallway meetings with the client. Which of the following should the project manager do to resolve this issue?

A project manager is working on the project charter.
Which of the following phases does this describe?