What is the drill up, drill down, drill by, drill trough? - BO Designer

What is the drill up, drill down, drill by, drill trough?

- Selection of one hierarchy to another hierarchy is known as drilling

- Drill Up: One level towards up is known as Drill UP
Ex : Month-Quarter-Year

- Drill Down: One level towards down is known as Drill Down
Ex: Year-Quarter-Month

- Drill By: Selection of one level directly is known as Drill By

- Drill Through; Drilling of data from one hierarchy to another hierarchy is known as Drill Through