OTBI Analysis - Include 'Schedule Name'/Best Subject Areas to use to link Person to Assignment Data?

Summary:

Hi,

im new to using OTBI and trying to create an OTBI Analysis to report on all employees assignements data and include their current Schedule Name.
(SCHEDULE_NAME from the ZMM_SR_SCHEDULES_TL)

i need to use the subject areas lsited below:

Workforce Management - Person Real Time (person data)
Workforce Management - Worker Assignment Event Real Time (assignment data inc Payroll Name and Department)

whenever i add in Schedule Name from Person Schedule Assignemnt (Workforce Management - Person Real Time) the analysis returns zero

what is the correct Suject Areas to use to link Person and Assignemnt Data