December 18, 2011

VARIATION.

I have been able to understand theimportance of identifying variation. The ability to recognise variation either in the process being improved or variation in the people undergoing the improvement process is very key. For process variation, being able to understand what is normal and consistent with a process rather than searching for a non existent reason to alter the process due to just one peculiar or special case. But I wonder if the control limits in companies can be changed? In a situation where the special cause has been identified and eliminated and an adjustment on the control limits is done; if that which acted as a special cause becomes a common cause does that mean the process is stable or more capable? And for people variation, the ability to recognize and be aware of their psychological needs, how it varies fom person to person, their input and the level to which it affects the improvement process is a very significant factor.


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  1. Tega you place here a beautiful question. . . .WHat happens if a special cause become a common cause. The answer is it depends. . . . . If the special cause is on the good side (extremely low defects on a production day) the aim of a manager is not to give bonuses to people (he should but it is not enough), the aim should be to identify the roots of that cause and integrate it to the whole system. In that way everyone can achieve this sales since it will be part of the system. If this happens all the time we might say that a process achieves continuous improvement. The opposite happens if the cause is on the bad side.

    Happy new year…..

    PS. If you understand variation you will see things in a different perspective. Keep on the good job

    27 Dec 2011, 07:21


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