In each of my parent group of tasks I have an approval task, followed by a milestone task. Both are important for reporting.
Example:
Task1: Manager approves ABC Webpage for publishing
Task2: Milestone: ABC Webpage ready for publishing -
Predecessor for Task2 is Task1.
Problem: When Task1 is marked Complete, I want Task2 to automatically mark Complete as well.
Task2 required no implementation, it is for reporting of Milestones only.