Processing a Dimension will execute the following steps?

Hi friends,

Please can you educate us, with regard to

Processing a Dimension will execute the following steps

1) Validates Hierarchy

2) Validate Dimension Member Formulas

3) Update Member data in BI

4) Bi Attributes change run

5) Invalidate Server Cache for Dimension Members by Updating version

what does the step 3, 4, 5 mean and how can I check the system (in which transaction code)

Thank you and kindest Regards

Srikaanth