There are few important notes for the user in constructing a good Tree Structure: 

• Each Tree Structure is unique based on the user’s creativity and demand.
• It uses Parent and Child concept; You need to identify the Parents FIRST before inserting the Child. 
•  Tree Structure can be easily combined from different file (Therefore each department or program coordinators can enter their own set of data at the Tree Structure & Merge together with others for Generate Process).
• 2 main types of Tree Structure: Master and Customized Tree Structure.