QUANTITATIVE TOOLS OF QUALITY

QUANTITATIVE TOOLS OF QUALITY

1. PARETO'S GRAPH

   • The 80% of the problems is produced by 20% of the reasons
   • To concentrate the efforts in locating and eliminating this few you the cause

2. HISTOGRAM

   • It allows to visualize a table of information showing the aspect of his distribution
   • Absolute frequencies or relative frequencies

3. CONTROL OF GRAPH

   • Is used to distinguish the variations due to special reasons from the random variations

4. DISPERSION OF GRAPH

   • Represent couples of values to visualize the correlation that exists between both

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