Introduction to SPC charts 

Why they were used in the creation of Tempo TaeKwon-Do.

I was educated in the use of SPC charts by Rolls Royce Airo Engine Manufacturing Division in the late 90s.
By using control limits the operator was alerted to intervene and correct a trend reducing scrap and improving performance.

Within TaeKwon-Do a punch can be correct (Knee spring, backward movement, etc) and still have a variation in speed of performance, due to in parts, the performers focus on a number of key factors. Not too slow and not to fast.

By analyzing each technique a middle achievable limit was arrived at, these limits can be achieved by everyone, young or old, small or tall, the movements can be adjusted to achieve a military style performance with a style correct to the teachings of the late great GM General Choi Hong Hi.

Why use Tempo?
The use of a beat, drums, chants music etc can be a great motivator, a group activity were all participates are equal develops a brother/sister hood. World seminars become a promotion for the unity of TaeKwon-Do instead of the mish mash of interpretations of various individuals, which of course will all be correct in their world.
There is only one truth and that is the truth you believe in?

As General Choi once told me, TaeKwon-Do is for the educated person, a scientific Martial art based around laws of physics. You should never argue the facts, as the truths behind the technique are the only truths and with educated debate everyone can arrive at the same conclusion. When asked will all of TaeKwon-Do technique remain the same for ever, he answered, who can tell, I hope that TaeKwon-Do continues to evolve within the limits (scientifically proven) as once something stagnates it dies.

It is my opinion that General Choi Hong Hi would have appreciated all the work that went into the making of Tempo and the Facts behind the development of this training aid. Tempo TaeKwon-Do has been revised 4 times since its conception in the late 1980s to its present format, I am sure Tempo will continue to develop and hopefully one day all ITF practitioners will benefit from the its use.

Control charts: a graphical means for hypothesis testing

Control charts provide a graphical means for testing hypotheses about the data being monitored. Consider the commonly used Shewhart Chart as an example.

Shewhart X-chart with control and warning limits
The probability of a sample having a particular value is given by its location on the chart. Assuming that the plotted statistic is normally distributed, the probability of a value lying beyond the:
• warning limits is approximately 0.025 or 2.5% chance
• control limits is approximately 0.001 or 0.1% chance, this is rare and indicates that
o the variation is due to an assignable cause
o the process is out-of-statistical control