Variance map

A variance map is a graphical representation of a population that demonstrates the magnitude of a measure (e.g. expenses, GPA, sales, etc.) and the variance of that variable against another measure (e.g. budget, last semester GPA, sales target, etc.) over time. Variance is typically used to demonstrate how the selected measure varies for a member of a population across contiguous time periods.
The variance map allows you to quickly visualize and identify the following four groups of individuals within a population:
* Rising Stars
* Fallen from Grace
* Consistently High Performers
* Consistently Low Performers
This visualization serves as the starting point for identifying the characteristics that are consistent between the members of a population who have moved from the Consistently Low Performers group into the Rising Star group during the time period studied, and the subsequent regression required to determine which of these factors positively correlate to their movement between these groups. Once these factors are identified, they can be applied to the other members of the Consistently Low Performers group to facilitate their movement into the Rising Star and Consistently High Performers groups.
Similarly, this practice can be applied to understand the movement of individuals from the Consistently High Performers group into the Fallen from Grace group in order to prevent further defection from the Consistently High Performers group.
In the graphical representation of the Variance Map, the y-axis indicates the magnitude of the measure being studied and the x-axis indicates the variance between the time periods in question for each individual.

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