Class, on a large project the PM cannot be everywhere - so, how do you, (as PM),

Question:

Class, on a large project the PM cannot be everywhere - so, how do you, (as PM), control scope on a large project involving multiple and locations? What control mechanisms would you use?
Stakeholders
A person, group or organization that has interest or concern in an organization. Stakeholders can affect or be affected by the organization's actions, objectives and policies. Some examples of key stakeholders are creditors, directors, employees,...