CompStat is a program that started in the New York Police Department, and several other departments have implemented it since. Officers are held accountable by tracking crime over time. Crime goes up, based on the data, and you can ask why. It seems like a fine idea, but problems arise when humans game the system to fill quotas. FiveThirtyEight highlights one such case within the NYPD.
Garbage in, garbage out, as they say.