Elegibility - Full time of service

Summary

Full time of service report and elegibility

Content

Hello experts.

Does anyone know how do i get "full time of service" in the system to manage eligibility?

What i mean with: Full time of Service
1 - Total time length since hire date, need original hire date (first of all)
2 - Shall compute all assignments while active - payroll enabled (and maybe others)
2.1 - if terminated, and had a rehire, i'm not supposed to consider the time off.
2.2 - If had a reassugnment (Transfer or Global Transfer) shall compute the whole time of all Enterprise, BU etc
3 - Some of these employees changed their Person Number, therefore imagine an intern that had a new Hire , not Rehire. this event shoul be counted as well