Materialized Views - Identifying the last refresh

Question

I presently access a series of views and materialized views. The materialized are maintained by a third party who offers little information regarding the frequency and success

Answer 1

Personally i use the all_snapshots, and this information is complementary to the information of the DBA_MVIEWS or ALL_MVIEWS

select owner, name, last_refresh, error, status, refresh_mode  
from  all_snapshots 
where owner = 'owner';