Build a BI Publisher Report that tracks incremental changes in Core HR

Summary

Build a BI Publisher Report that tracks incremental changes in Core HR

Content

Hi Experts,
I have a requirement for a BI Report wherein I need to pull a lot of changes in Core HR data including-assignment Status, Business Unit, Legal Employer, Job Name, Department, Location, Assignment Category, New Hires, Terminations and Manager Changes.
User may select few or all of these change areas.
Parameters include: change area selection,from date & to date.Both dates are defaulted to SYSDATE.
Now the challenge is they want to track incremental changes & not just initial and final values in a period say between first and last of the month of say August. If there were 3 changes in an employee's job then all 3 should show up in report & not just first and last. (Guess object version number can be used in someway here)