A team member has escalated an issue to the project manager, stating that they have...

A team member has escalated an issue to the project manager, stating that they have done their part of the job. Their concern is that there is still no response from the other party in the service level agreement (SLA). The team member is eager to find a resolution for the reported issue.

What should the project manager advise the team member to do to ensure that the project escalation mechanism is effective?