Best practice in Oracle Fusion Cloud to define which area ensures Purchase Order accuracy

Summary:
What is the best practice in Oracle Fusion Cloud for defining which area is responsible for ensuring the accuracy of Purchase Order information in the Procure-to-Pay process?

Content (please ensure you mask any confidential information):
A customer is requesting best practices for the Procure-to-Pay process. One of their questions is about responsibility: which business area should be accountable for ensuring that the Purchase Order information is accurate and compliant before it is sent to suppliers?

From an Oracle Fusion Cloud perspective, what is considered best practice for assigning this responsibility, and how should organizations structure ownership between Procurement, Finance, and Internal Control?