1. SAP S/4HANA Cloud Documentation: In the "How to Create Requests for Quotation" guide
it is explicitly stated: "You can create a request for quotation (RFQ) in the following ways: [...] With reference to a purchase requisition."
Source: SAP Help Portal
SAP S/4HANA Cloud
Public Edition 2402
Sourcing and Procurement > Operational Procurement > Request for Quotation (RFQ) > How to Create Requests for Quotation.
2. SAP S/4HANA Fiori App Documentation: The documentation for the "Manage Purchase Requisitions (Version 2)" Fiori app lists its key features
including the ability to: "Create follow-on documents
for example
purchase orders or requests for quotation."
Source: SAP Help Portal
SAP S/4HANA 2023
Product Assistance > Enterprise Business Applications > Sourcing and Procurement > Operational Procurement > Purchase Requisition > Fiori Apps for Purchase Requisitions > Manage Purchase Requisitions (Version 2).
3. SAP S/4HANA Training Courseware: The official SAP training course for Sourcing and Procurement outlines the standard process flow where a Purchase Requisition is a precursor to an RFQ. The creation of an RFQ with reference to a PR is a fundamental exercise in the sourcing unit.
Source: SAP Learning Hub
Course S4500 (SAP S/4HANA Sourcing and Procurement - Functions & Innovations)
Unit 4: Sourcing
Lesson: Creating Requests for Quotation.