Looks like there’s a small typo in your flow.

It should be:

REQ → RITM → SCTASK

Now, to answer your question:

A service request typically has three parts:

• Request initiation (REQ → RITM)
• Approval
• Fulfillment (SCTASK)

In some use cases, the business may not require an approval step. In those scenarios, the flow becomes:

REQ → RITM → SCTASK

This aligns with the basic ITIL process.

Refer : ITIL: The Service Request Management Process