Tzn. użycie (zasady działania) zegara do prezentacji przebiegu procesu lub procesów, jak np. poniżej:
"Using a clock analogy, the arrangement of observed weather elements plotted around the station model would include the air temperature at the 10 o'clock position; the sea level corrected air pressure would be located at the 2 o'clock position and the dewpoint temperature (an indicator of the water vapor in the atmosphere) is at the 8 o'clock position. If some significant weather phenomenon were observed, such as precipitation or some obstruction to horizontal visibility (fog or blowing snow), then a special symbol would be plotted in the 9 o'clock position. "
http://www.meteor.wisc.edu/~hopkins/online/spring/9902tsup.h...