Basic tools of quality

Basic tools of quality

1. Control charts

   • That are data of a process captured by a graph with established limits, exists different types of control charts like:
     • Graph R
     • Zone graph
     • Graph P
     • Graph C

2. Frequency distribution

   • The way of series of observations are ordered by groups, normally in ascending and descending order
     • Absolute frequency
     • Relative frequency
     • Accumulative relative frequency
     • Cumulative relative frequency

3. Measures of central tendency and dispersion

   • Statistical measures that aim to summarize a set of values in a single value
     • Average
     • Median
     • Mode
     • Variation range
     • Variance
     • Typical deviation
     • Coefficient of variation

4. Statistics and parameters

   • Statistics is a numerical quantity calculated on a sample that summarizes information in some aspect. The parameter summarizes the values that it's takes in some attribute.
     • Normal curve
     • Parameters estimation