Call Records, Read the Way an Analyst Reads Them CDR
A contact whose last call is three weeks before the record ends has stopped. That is a fact with a date on it, and it is invisible in a sorted column.
The records
Who to look at
Pattern of life
The whole set by day of the week against hour of the day. A working pattern, a night pattern or a change of pattern is visible here and is not visible in a column of times, which is why this is the output analysts reach for first.
Contacts
In common
The working
This reads records you already hold. It does not fetch anything, look a number up, or resolve one to a person.
Questions people ask about CDR