|Tutorial > Charts > Types of charts||View a Screen Cam demo.|
|Types of Charts|
AT Sigma SPC features comprehensive and advanced charting, that easily gives the user valuable information. From an overall view of the process the user can drill down, revealing more detailed information as needed.
Table of contents:
When a new SPC file is loaded, the first window shown is the Status Grid Window, which displays an overall view of the process:
You can return to the Status Grid by clicking on the Status Grid button ().
The image below shows each one of the four types of charts available from the Status Grid window: Histogram, Trend chart, Control chart and Four in One chart.
|Just like in the status grid, color coding gives a snapshot view of the process, giving instant information on which processes to examine.|
Control charts are predefined in the SPC setup for each variable. They can be Xbar-R, Xbar-S, X-mR. Just select a variable and control chart and it will display itself. AT Sigma SPC provides powerful analysing features that will help you determine if out of control situation might occur.
on any point in the control chart, in depth information
is shown for that particular point.
From this window, tags with comments can be added.
Histograms show the distribution of the data with curve fits to determine descriptive statistics and estimates on yield.
Four in One Chart
The Four in One Chart is a composite of the control chart and the histogram with some descriptive statistics. It is useful as a summary snap shot of the process
The trend chart is a sample snapshot of the process distribution over time. The upper right plot is the most current data.
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