It is very frustrating when a group gathers statistics and measures everything it can. And the others do not. I administer servers. Our group tires to measur

It is very frustrating when a group gathers statistics and measures everything it can. And the others do not. I administer servers. Our group tires to measure what it can, keeps historical data. Then we get a call from the application owners: 'Users are complaining about slow performance.' Who? 'A few. I didn't keep the email. It's just slow, look into it, will you?' So what can I say but 'Server x did this and such a time and measure y is normal but I don't think that's your problem because of reason z'. In other words, yes, I finger point because I _know_ it's not my problem. And as often or not 'a few' users are one or two people whose problem went away when they restarted their PC.