Which event tracks the progress of the ART toward meeting the PI Objectives?

The ART Sync is a weekly event that brings together the representatives of the teams and stakeholders of an Agile Release Train (ART) to review the progress and status of the current Program Increment (PI). The ART Sync tracks the progress of the ART toward meeting the PI Objectives by using various metrics and indicators, such as the PI burnup chart, the team and ART predictability measures, the feature completion report, and the dependencies and risks status. The ART Sync also provides an opportunity to identify and resolve any impediments, issues, or blockers that may affect the PI delivery.

References:

ART Sync: This article from the Scaled Agile Framework explains the purpose, agenda, and participants of the ART Sync, and how it supports the alignment, collaboration, and execution of the ART.

PI Objectives: This article from the Scaled Agile Framework defines the concept and attributes of PI Objectives, and how they can be used to align and measure the outcomes of an ART or Solution Train.