Let's remember that these custom metrics and estimates are typically extrapolated off of scraped data, or data purchased from IP's, or data from custom toolbars, all of which are data samples. So it is kind of like; scraped data +/- data extrapolations + in-house data + custom metrics = final product.
Such questions might swarm in your head when your printer acts up, or your network is at fault. But that's okay. We are here to guide you in identifying the factors leading to this issue. We will also help you in fixing it. To achieve this, you just have to stick to the instructions on this web page and perform them in the given order. In the end, you will definitely reap the fruits of your labor. Let's start with the causes and some basic aspects you need to check before beginning with the actual troubleshooting methods.