Real-Time Failure Groups

Real-Time Failure Groups are used determine which real-time checks are performed when entering data for a Characteristic or Process.

After Real-Time Failure Groups are created, they must be assigned to Characteristics (for SPC) or Processes (for DMS or OEE) in order to take effect. Once assigned, these Groups are used during Inspections to determine real-time failures in Tests which collect data for the associated Characteristics or Processes.

Settings

Field	Description
Name	Unique name of the Real-Time Failure Group.
Hide in Lists	Whether the Real-Time Failure Group appears in lists. Hiding does not affect any previously-stored data.
Real-Time Failures	The real-time checks to perform when entering data for a Characteristic or Process set to use this Group.

Data Types

Real-Time Failure Groups belong to a particular data type (either SPC, DMS, or OEE). Use the dropdown at the top of the list page to change which data type is being viewed. This dropdown also affects the type of Group created when clicking the Add button.

Failures

See Statistics for details on how stats for individual records and populations are calculated.

SPC Failures

Label	Occurs When	Can be Modified via Global Settings	Code
X-Bar Above UCL	An X-Bar is greater than the dynamic upper control limit.	No	xBarAboveUCL
X-Bar Below LCL	An X-Bar is greater than the dynamic lower control limit.	No	xBarBelowLCL
7 X-Bar In A Row Above Mean	A run of X-Bars are all greater than the centerline.	Yes	nXBarInARowAboveMean
7 X-Bar In A Row Below Mean	A run of X-Bars are all less than the centerline.	Yes	nXBarInARowBelowMean
7 X-Bar In A Row Increasing	A run of X-Bars are all increasing in value.	Yes	nXBarInARowIncreasing
7 X-Bar In A Row Decreasing	A run of X-Bars are all decreasing in value.	Yes	nXBarInARowDecreasing
2 Of 3 Above 2 SD	N out of N+1 consecutive X-Bars are greater than the centerline plus 2 standard deviations.	Yes	nOfNPlus1Above2SD
2 Of 3 Below 2 SD	N out of N+1 consecutive X-Bars are less than the centerline minus 2 standard deviations.	Yes	nOfNPlus1Below2SD
4 Of 5 Above 1 SD	N out of N+1 consecutive X-Bars are greater than the centerline plus 1 standard deviation.	Yes	nOfNPlus1Above1SD
4 Of 5 Below 1 SD	N out of N+1 consecutive X-Bars are less than the centerline minus 1 standard deviation.	Yes	nOfNPlus1Below1SD
8 X-Bar In A Row Outside 1 SD	A run of X-Bars are all outside of the 1 standard deviation limit from the centerline.	Yes	nXBarInARowOutside1SD
14 X-Bar In A Row Alternating	A run of X-Bars alternate from less than to greater than the centerline.	Yes	nXBarInARowAlternating
15 X-Bar In A Row Within 1 SD	A run of X-Bars are all within the 1 standard deviation limit from the centerline.	Yes	nXBarInARowInside1SD
X-Bar Above Fixed Control Limit	An X-Bar is greater than the Characteristic's Upper X Fixed Control Limit.	No	xBarAboveFixedControlLimit
X-Bar Below Fixed Control Limit	An X-Bar is less than the Characteristic's Lower X Fixed Control Limit.	No	xBarBelowFixedControlLimit
X Above Individual Limit	A single value is greater than the Characteristic's Upper Individual Limit.	No	xAboveIndividualLimit
X Below Individual Limit	A single value is less than the Characteristic's Lower Individual Limit.	No	xBelowIndividualLimit
X Above Spec	A single value is greater than the Characteristic's Upper Spec.	No	xAboveSpec
X Below Spec	A single value is less than the Characteristic's Lower Spec.	No	xBelowSpec
Range Above UCL	A range is greater than the dynamic upper control limit.	No	rangeAboveUCL
Range Below LCL	A range is less than the dynamic lower control limit.	No	rangeBelowLCL
7 Range In A Row Above RBar	A run of ranges are all greater than the range centerline.	Yes	nRangeInARowAboveRBar
7 Range In A Row Below RBar	A run of ranges are all less than the range centerline.	Yes	nRangeInARowBelowRBar
7 Range In A Row Increasing	A run of ranges are all increasing in value.	Yes	nRangeInARowIncreasing
7 Range In A Row Decreasing	A run of ranges are all decreasing in value.	Yes	nRangeInARowDecreasing
Range Above Fixed Control Limit	A range is greater than the Characteristic's Upper R Fixed Control Limit.	No	rangeAboveFixedControlLimit
Range Below Fixed Control Limit	A range is less than the Characteristic's Lower R Fixed Control Limit.	No	rangeBelowFixedControlLimit

DMS Failures

Label	Occurs When	Code
Above Acceptable Defect Percent	A sample's number of defects divided by the sample size is greater than the Process's Acceptable Defect Percent.	aboveAcceptableDefectPercent
Below Yield	A sample's yield percentage is less than Process's Acceptable Yield. See Statistics for how yield is calculated.	belowYield

OEE Failures

Label	Occurs When	Code
Below Acceptable Availability	An OEE Test's calculated Availability is less than the Process's Acceptable Availability.	belowAcceptableAvailability
Below Acceptable Performance	An OEE Test's calculated Performance is less than the Process's Acceptable Performance.	belowAcceptablePerformance
Below Acceptable Quality	An OEE Test's calculated Quality is less than the Process's Acceptable Quality.	belowAcceptableQuality
Below Acceptable OEE	An OEE Test's calculated OEE is less than the Process's Acceptable Overall.	belowAcceptableOEE

Import/Export

Real-Time Failure Groups can be imported and exported using the following CSV structure.

Column Header	Create	Update	Allows Multiple	Description
ID	Not Allowed	Required	No	Real-Time Failure Group's Internal ID
Name	Required	Optional	No	String
Hidden	Optional	Optional	No	True | False
Data Type	Required	Not Allowed	No	spc | dms | oee
Add Failure	Optional	Optional	Yes	SPC Failures: xBarAboveUCL | xBarBelowLCL | nXBarInARowAboveMean | nXBarInARowBelowMean | nXBarInARowIncreasing | nXBarInARowDecreasing | nOfNPlus1Above2SD | nOfNPlus1Below2SD | nOfNPlus1Above1SD | nOfNPlus1Below1SD | nXBarInARowOutside1SD | nXBarInARowAlternating | nXBarInARowInside1SD | xBarAboveFixedControlLimit | xBarBelowFixedControlLimit | xAboveIndividualLimit | xBelowIndividualLimit | xAboveSpec | xBelowSpec | rangeAboveUCL | rangeBelowLCL | nRangeInARowAboveRBar | nRangeInARowBelowRBar | nRangeInARowIncreasing | nRangeInARowDecreasing | rangeAboveFixedControlLimit | rangeBelowFixedControlLimit DMS Failures: aboveAcceptableDefectPercent | belowYield OEE Failures: belowAcceptableAvailability | belowAcceptablePerformance | belowAcceptableQuality | belowAcceptableOEE
Remove Failure	Not Allowed	Optional	Yes	Same as Add Failure

See Also

• Real-Time Alerts
• Collecting SPC Data
• Collecting DMS Data
• Collecting OEE Data
• Global Settings: Real-Time Failures