Which Control Quality tool is also known as an arrow diagram?

Some company board of director members feel that the organization does not possess the capabilities to handle the scope and complexity of its projects. As a result, they request an external audit of past project performances. The project management office (PMO) asks previous project managers about their availability to answer questions for the audit.
What else does the PMO need?

An input to the Plan Stakeholder Management process is:

A software system is being built for a company. Once the system is in production, the team would like to collect usage data to evaluate the delivered value.
Which evaluation practice should the project lead use to obtain accurate usage data?

While preparing a project charter for a new project, a project manager reviews lessons learned from previous projects the lessons learned documents show frequent issues with low engagement levels and stakeholder misalignment on project objectives.
What should the project manager do to avoid repetition of this issue in the new project?