Which of the following actions can be used to ensure the quality of project deliverables?

Analyzing performance information, such as quality control measurements, defect rates, and process adherence data, allows the project team to identify trends, deviations, and areas for improvement. This directly contributes to ensuring the quality of deliverables by verifying that processes are followed and outputs meet standards as part of quality assurance.

While using ISO certified vendors can contribute to quality, it does not directly ensure the quality of project deliverables on an ongoing basis for a specific project.