said by cooldude9919 :

Real "network traffic engineers" would have supplied mrtg graphs with some sort of description for each link.

said by TKJunkMail :

The data they are supplying is going to convince politicians and bureaucrats and not other network engineers.

As can be observed in the table above, the total percentage of all four types of congested network links during a given month in the period in question has varied between 2.6% and 5.2%. While these numbers may seem low to the average lay person, they are significant to network traffic engineers such that it is important to consider the number of congested links in the proper context.

Congestion and Circuit Capacity Planning

Like many organizations, we collect router statistics via SNMP every five minutes. While five-minute averages are a useful measure of how a circuit is doing in relationship to its bandwidth limit, they do not tell a lot about the instantaneous (one second, or smaller, time scale) state of a circuit that governs interactive performance. If a circuit is saturated for several ten-second bursts during a single five-minute period the average utilization might appear to be quite reasonable. An interactive user, however, would likely say that the network was slow while his packets were waiting in a router buffer.

said by NetAdmin :

are pretty vague and the fact that they say that it depends on how you look at it just confirms that they are overly vague and presented that way on purpose. Concrete information should be presented.