Determining Specifics of 20:80 Rule (Pareto)

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WWGD
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Hi,
The 20:80 , aka Pareto rule applies in certain processes. Pareto states that in some cases,
20 percent of the input generates 80% of the output (obviously not intended to be exactly
20 and 80). Example: 20% of customers generate 80% of the revenues , or 20% of a list of
problems in an operating system generate 80% of customer complaints, or 20% of the population
owns 80% of assets.
Anyway, my question is on how do determine if/when the Pareto distribution applies to a given
situation , or if there are some general results on how to apply it.
EDIT: I am trying to understand the type of data one would have to look at and, given the data, how one
can "tease out" from the data whether there is a 20-80 relation.
Thanks.
 
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Dale
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To the best of my knowledge there isn't such a rule. It applies in a lot of situations, but there isn't something that you can use to predict in advance when it will and won't apply. Basically you check any given scenario and say "it worked" or not. It is really just a heuristic.
 
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phinds
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My experience/belief is the same as Dale's
 
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