HistogramHistograms in SPC for Excel show:

  • Most frequently occurring value
  • Amount of variation in the process
  • Shape of the distribution (normal or non-normal)
  • Relationship to specifications
  • Descriptive statistics

 

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Histograms and SPC for Excel

Our SPC software, SPC for Excel, easily constructs and updates histograms. A histogram is a bar chart that provides a snapshot in time of the variation in a process. It tells us how often a value or range of values occurred in a given time frame. A histogram will tell us the most frequently occurring value (the mode), the overall range, and the shape of the distribution (e.g., bell-shaped, skewed, bimodal, etc.).

Histogram Key Features

  • Three histogram options
    • Basic histogram
    • Create multiple histograms at once
    • Group histogram to compare more than one process on same histogram
  • Easily update with new data
  • Add specifications and nominal
  • Add normal distribution or 1 of 13 non-normal distributions
  • Add descriptive statistics
  • Select which descriptive statistics to include
  • Change number of classes/class width on existing histogram

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