Entries in the "Previous Month" column are per six hours, in the "Previous Week" and "Following Week" columns per hour, and in the "Yesterday" and "Today" columns for 15-minute periods (if the granularity is available).    
Site state or evaluation good (ok)     Site in partial downtime     Site not in service (Waiting Room)      
Site or evaluation has issues (warning)     Site or service in full downtime     Site not in service (Morgue)       information as of
Site or evaluation failed (error)     Site or service in unscheduled downtime     Site or evaluation status unknown      
Site at risk of downtime     © Copyright author, CMS, Fermilab, and others 2016