Definition of Attribute Data:
Attribute data is purely binary in nature. Good or Bad, Yes or No. No analysis can be performed on attribute data.
Attribute data must be converted to a form of Variable data is called discrete data in order to be counted or useful.
Attribute data is qualitative data that can be counted for recording and analysis.
Examples include the presence or absence of a required label, or the installation of all required fasteners.
Attribute data is not acceptable for production part submissions unless variable data cannot be obtained.
The control charts based on attribute data are percent chart, number of affected units chart, count chart, count-per-unit chart, quality score chart and demerit chart.