To make a clear reference to what Analogy is, it is first necessary to take into account that it derives from the word Analogy, it is understood from the Greek terms " Ana " which means " Reiteration or comparison " and " Logos " which It indicates the meaning of " Reason and knowledge ", that is to say that the analogy is that consistency of things which is repetitive. You can make an analogy of the mistakes that people make over and over again, in the same way that you can make an analogy of what by naturean animal does every time its instinct asks it to. The trip that penguins make each year to mate is an analogy, since they reiterate the function they commit each time in an analogy way according to the reaction they have with the environment that surrounds them and their purpose.
When an object is analog, we mention everything that is destined to be continuous, proper to its behavior must be that its function does not prevent the analog of its question from being interrupted. Analog is continuity then. If we associate it with everyday life we will find an endless number of artifacts and gadgets that are analog, the most common being the clock. Its gears and parts fit together in an unencumbered way, thus carrying a specific function, telling the time, but that mechanism behaves in an analog way, why? by the simple fact that the needle returns to the same place from where it initially started to indicate to the person that a cycle of time has finished and so on until it becomes an analog indicator of time.
Understand that an analog function is a very elementary description of what the object in question actually does. The continuities are maintained as long as there is no agent that intercedes between the analogue function. Public transport should be constantly analog, but in the event that the path for which it is designed cannot be followed, the route must be diverted, interrupting the analogy but continuing the work.