In ServiceNow,related listsdisplay records that have a relationship with the current record based onreference fieldsordatabase relationships. When adding a related list to a form, users select from aList Collector, which shows available related lists based on table relationships.
B: Catalog Task # Parent
Catalog Tasksare individual work items that belong to aRequest Item (RITM).
TheParentfield links a Catalog Task to its correspondingRITM.
This related list allows users to view all Catalog Tasks associated with a parent request.
C: HR Case # Parent
InHR Service Delivery (HRSD), HR Cases track employee requests.
TheParentfield links an HR Case to a parent HR Case or HR Service Request.
This related list allows HR agents to see all related sub-cases.
D: Problem # Parent
Problem Recordscan have aParent-Childrelationship where a child problem is linked to a larger problem.
TheParentfield is used to establish this hierarchy.
This related list helps track all sub-problems linked to a main problem.
A: Release Phase == Parent
"Release Phase" is not a standard related list in ServiceNow.
TheRelease Management moduleusesphases, but they do not typically function as aParentreference.
E: Outage # Task Number
WhileOutagescan be linked toTasks, they arenotcommonly referenced as a related list in standard implementations.
A more appropriate relationship would be"Affected CI"rather thanTask Number.
References:ServiceNow Documentation:Related Lists Overview
ServiceNow Configuration Guide:Adding Related Lists to Forms