I am working as a dba in a small bank and I got an assignment to develop an in-house tool for detecting fraud scenarios. I know the technical part of manipulating multiple data sources and mining data, but do you happen to know what tests/scenarios the banks use to detect fraud across all types of transactions (e.g. deposits, cards, online banking, employee fraud, wire and ACH etc)? Thanks.
That would be something that your business users would decide.
Things I could think of off the top of my head (which are probably all from movies that I've seen):
- a large number of very small transactions over large period of time (so you don't notice - ever watch "Office Space" )
- a large number of transactions in a short period of time
- transactions occurring outside of the Country within which the account holder resides