This is a very simple qualitative method of determining "busy" times in any metric. Quite simply, the brighter the dot, the more activity.

Any metric that can be quantified against time may be mapped, examples include:

  • Sales volumes
  • Trading volumes
  • Foot traffic through store departments
  • Call Center activity
  • Road traffic
  • Heart-rate, blood pressure etc

This style makes it easy to see trends such as busy times of the day, or year. The examples shown below relate to a set of data in the field of internet security.


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