DWH time slices show different min and max dates on PPM schema vs min/max dates on DWH (dwh_com_periods table.)
Example queries: PPM Schema: select min(SR.FROM_DATE), max(SR.TO_DATE) from prj_blb_slicerequests sr where SR.IS_DWH_REQUEST = 1
DWH schema: select min(period_start_date), max(period_end_date) from DWH_CMN_PERIOD
Why don't the end dates match? Should they?
Release: Component: PPMTSL
In order get get the periods for the DWH there are other criteria taken into consideration.
The query you should compare on PPM schema is
select min(period_start_date), MAX(PERIOD_END_DATE) from DWH_CMN_PERIOD_V
If you then review the SQL behind this view you will see it looks at items such as fiscal periods (biz_com_periods) and data in rpt_calendar table in addition to the actual DWH slices in the Time Slices page.