Defects and defectives
- Defective Measures
- Single attribute measure that represents whether a product is either
defective or acceptable (not defective). A product may have defects but
still be considered acceptable (not defective).
Binomial data are classified into one of two categories such as pass/fail or go/no-go. Binomial data are often used to calculate a proportion or a percentage, such as the percentage of sampled parts that are defective.
- Grouped Defects
- Grouped attribute measure that represents the presence of a
imperfections. A defect is countable. A single item can have multiple
defects of the same type or different types. For example, a phone has 5
defects: 3 scratches, 1 chip, and 1 dent.
Poisson data are often used to model an occurrence rate, such as defects per unit.
- Grouped Defectives
- Grouped attribute measure that represents whether a product is either
defective or acceptable (not defective). A product may have defects but
still be considered acceptable (not defective).
Binomial data are classified into one of two categories such as pass/fail or go/no-go. Binomial data are often used to calculate a proportion or a percentage, such as the percentage of sampled parts that are defective.
Add separate defective types
If you have a particular defective type that you want to monitor on its own control chart, you must set it up as a defective measure.
The Labeling and packaging process has two defective measures to monitor on separate control charts.
- In the Defective Measures section of the template, select Add Defective Measure.
- Enter a name and an optional description for the new measure and then select OK.
- Repeat these steps for all defective measures that you want to monitor separately.
- Save your changes.
Add grouped defective types
If you have multiple defective types that you want to monitor together, aggregated on a single control chart, you must set it up as a grouped defective.
The Inspection process has several types of defectives to monitor together on a single control chart.
- In the Visual Inspection section of the template, select Grouped Defectives.
- Select Edit List of Grouped Defectives.
- Select Add Defective Type.
- Enter the name of the defective type and an optional description for the new defective cause.
- Select OK.
- Repeat these steps for all defective types.
- Save your changes.
Select grouped defects and defectives for your process
- Go to the Components page and select a product. Then select the process flow step of your product.
- Open the process step and go to the Process Summary section to access the list of defects and defectives.
- Select Edit List of Grouped Defects and select the defects to add.
- Save your changes.
- Select Edit List of Grouped Defectives and select the defectives to add.
- Save your changes.
