PQA Chart (US/TW/CN patent obtained)


Growth rate, calculated as (New value-Original value) / Original value, is frequently used to present how much more or less the New value is than the Original value. The major problem of growth rate calculation is that when the Original value, the denominator of the calculation, is zero or a negative value, the growth rate cannot be calculated or even provides an incorrect growth rate.

Therefore, PQA chart, with auto adjustments on the denominator and conversion to angle, was invented to solve the problem. PQA chart can be applied to any “ratio” calculation, such as “Completion rate”, calculated as Actual value / Target value.

In addition, with the angle conversion invention, PAQ chart provides the effect similar to the commonly used logarithm method and can present any ratio within certain range. And thus solves the common visualization problem that when one ratio is too large, other ratios seem to be depressed on chart and become hard to tell their movements.

Examples of Graphician PQA Chart:

Period 0 1 2 3 4 5 6 7 8 9 10
Data 20 10 -10 0 40 0 -40 -40 -60 30 60
Growth Rate(%):
q=[(y-x)/x] *100%
- -50% -200% -100% NA -100% NA 0% 50% -150% 100%
Data
Growth rate calculated by traditional method
  • The growth rate calculated by traditional method cannot be performed when denominator is 0, and even provides mistaken growth value when denominator is a negative value. For example, when the data above increased from -10 to 0, the growth rate was mistakenly calculated as -100% by the traditional method.
Period 0 1 2 3 4 5 6 7 8 9 10
Data 20 10 -10 0 40 0 -40 -40 -60 30 60
Graphician Growth Rate (%):
q=[(y-x)/│x│]*100%
- -50% -200% 100% NA -100% NA 0% -50% 150% 100%
Arctangent Angle
(Radian Value)
- -0.46 -1.11 0.79 1.57 -0.79 -1.57 0.00 -0.46 0.98 0.79
Graphician Angle Value - -59 -141 100 200 -100 -200 0 -59 125 100
Data
Graphician PQA chart
  • Graphician PQA chart not only can still calculate the growth rate when denominator is 0, but also can present the correct growth rate when denominator is a negative value. Now when the data increased from -10 to 0, the Growth rate can be correctly presented as 100% in percentage or as 100 in Angle Value.
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