One cannot overstate this and human capability to optimize for metrics ( and what is apparently rewarded ). Anecdote time. My former manager had an idea to measure the amount of average alerts per hour and tore into people, whose values fell below a certain treshold. What did people do? They stopped doing harder alerts whenever they could and did 'easy ones' to pump up their stats. I have seen it since and whenever I do, I have a quick talk about people not being idiots and importance of metrics not being used for evaluation ( or if you do, to be ready for its consequences ). In case you are wondering, former's managers response was to double down and hide the stats so that people don't know where they stand.. eh.