Sometimes measuring only one thing can be worst than not measuring anything at all.
Whenever you work with metrics you need to remember that it is not as easy as waving a number and having everyone agreeing with you on the conclusion of your observation. You need to take into account that some people, specially those who have something to loose with your findings, will try to show why you are wrong (and they are right!)
Here are some quick pointers on how to succeed with your metrics based observations in your (political) workplace.