Sometimes, going 50mph is slow, sometimes it will get you arrested. The position on the dial is completely irrelevant, and is thus noise. The gas gauge howeve

Sometimes, going 50mph is slow, sometimes it will get you arrested. The position on the dial is completely irrelevant, and is thus noise. The gas gauge however has a permanent meaning. Empty is bad. The Tachometer is also useful if you are driving a manual since you want to keep from redlining and keep from stalling. On almost every business dashboard I have seen, gauges are more like speedometers. People love to put revenue in a gauge. More is better and they usually have a goal that they want to hit. But what happens if they max out the gauge? Do they stop sales? Or do they adjust the gauge to go higher (thus making it even more meaningless and difficult to read).