The impact of measuring is that these things get done, sometimes with unwanted consequenses. Ross Gittens of the Age published this article on 21st August 2017 (http://todayspaper.smedia.com.au/theage/shared/ShowArticle.aspx?doc=AGE%2F2017%2F08%2F21&entity=Ar01900&sk=889F05BD&mode=text). As he points out bonuses can cloud what organisations are striving for, so also be careful in rewarding what is measured.