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.
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% |
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 |