How can i build SR and change management in helpdesk portal

At present in ticketing their is incident how can i build the SR & change management separate in ticketing portal

can some one help me out this

What is SR?

If it is service request, then to extend ticketing system to support Service Request (SR) and Change Management processes alongside Incident Management, you can customise the existing setup by creating new doctypes, workflows, and portals as needed.

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