Characteristic properties

Name

The unique name for the characteristic.

Description

A description for the characteristic.

Type

The type of the characteristic.

For more information about the characteristic types and the additional property settings related to them, see Variable characteristic properties, Binary attribute characteristic properties, and Counted attribute characteristic settings.

Unit of Measure

The unit of measure for the characteristic.

Severity

The enumerated value for the severity type.

Default Chart

The enumerated value for the default chart. The value depends on the characteristic type.

Automatic Characteristic Collect

The characteristic that needs to be collected automatically. By default, the False option is selected.

Time Interval

The time interval between the measurements when the sample size is greater than one and the characteristic is collected automatically. This shows the delay between measurements within a sample, and is applicable only to variable characteristics.

Time Interval Unit

The unit of the interval:

• Seconds

• Minutes

• Hours

Number of Decimals

The number of decimals that are to be displayed. By default, the number is 0.

Normal Sample Size

The normal number of measurements in a sample.

• If the characteristic type is a variable or an attribute with a fixed sample size, the normal number of measurements in a sample is displayed.

• If the characteristic type is a variable and normal sample size is 1, the data is not grouped.

Minimum Sample Size

The minimum number of measurement required in a sample. If a sample is collected and the number of measurements is less than the minimum value, the subgroup is not charted in the SPC charts. The subgroup is also not included while evaluating the run rule violations based on the SPC charts.

Maximum Sample Size

The maximum number of measurement required in a sample. You cannot enter more measurements than the maximum measurement value.

Number of Defect Opportunities

The number of defect opportunities for every tested item. This is available only for counted attributes.

Samples Required Before Control Limits Are Calculated

The number of samples that are required for calculating the control limits. By default, the samples before control limit value is 1.

Characteristic Spare1–4

User-defined information about the characteristic.