Short Run Control Chart: process control monitor for situations where more than one product is made on the same equipment. If there are frequent changes to the different products, it’s difficult to build a meaningful control chart using traditional methods. Short Run Control Charts overcomes this barrier by normalizing the data and charting all the products on a single chart.
Example
To illustrate Short Run Control Charts we will be using the data table “Chocolate Factory.jmp”.
Open this table and bring up Control Chart Builder (Analyze > Quality and Process > Control Chart Builder).
Open the drop-down box below the column list and notice there is an option for “Short Run” .
Select “Short Run” from the drop down list and drag “% Cocoa” to the “Y” axis and “Box” to the “Subgroup” box.
While building the chart, notice a new drop-zone box appears called “Part” (see below).
Drag column “Product” to the “Part” drop-zone.
Now the chart is updated as shown below.
The Limit Summaries are the normalized limits. The Product Statistics are the unnormalized Targets and Sigma for each product.
