Hide high and medium options in impact field when selected user doesnt have certain roles as below

[marrikruthi]

When a user is creating a new incident record, if he does'nt have the incident_impact_urgency_write role remove high and medium impact options from incident form using client script.

[Sid_Takali]

Hi @marrikruthi Try below onLoad Client Script code

if(g_form.isNewRecord()){
var isAdmin = g_user.hasRole('incident_impact_urgency_write');
	if (!isAdmin){
		g_form.removeOption('impact', '1');
               g_form.removeOption('impact', '2');
	}
}