Quantitative Tools

Quantitative Tools

1. Control Charts

   • Distinguishes random variations that are repeated between limits
   • Diagnosis Control Improvement
   • Graphics by variables: Stocks & Ranges Graphics by Attributes: Faulty Fractions & Defects by Product.

2. Pareto Diagram

   • Analyzes causes of the most important problems
   • Few vital 80% Many Trivial 20%
   • Shows the relative importance of problems in a simple, fast and visual way

3. Histogram

   • Bar chart showing data distribution
   • It measures accumulation or tendency, variability or dispersion.
   • Studies continuous variables grouped into classes.

4. Dispersion diagram

   • Describe the behavior of two variables.
   • Determine relationship between variables
   • Types: No relationship High Correlation (Negative-Positive) Low Correlation (Negative-Positive) Complex Relationship

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