Histograms 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
Watch a Video Highlighting How to Construct a Histogram with SPC for Excel
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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