Specifying Key and Fault Equivalence Data Fields
In the
FMEA Design file, you use the checkboxes in the
Key and
FMEA Equivalence Data columns to specify the fields for the
Project’s FMEA Fault Equivalence file. For more information, see
FMEA Fault Equivalence Files.
• In the Key column, you select as many as five fields, which are then shown in the FMEA Key Definition pane of the FMEA Fault Equivalence file. In this pane, you specify the values to match that results in copying the FMEA data in the Fault Equivalence Data pane into your FMEA.
• In the FMEA Equivalence Data column, you select any number of fields, which are then shown in the FMEA Fault Equivalence Data pane in the FMEA Fault Equivalence file. In this pane, you supply the data to copy into your FMEA when the data that you enter in the FMEA Worksheet table matches the values specified for the key fields.
The procedure for defining key fields and fault equivalence data fields for the FMEA Fault Equivalence file follows.
1. If the FMEA Design file is not already open, then open it.
2. In the Key column, select the checkboxes for as many as five key fields.
If multiple System files in the Project use different Table Format files for their FMEA Tree Items and FMEA Worksheet tables, select key fields from only fields that are in these tables for all System files.
3. In the Fault Equivalence Data column, select the checkboxes for the fields in which to enter the data to copy into your FMEA when a key match occurs.
4. When finished, close the file.
If you try to open the FMEA Fault Equivalence file before you define key fields and fault equivalence data fields, a window opens, indicating that this file cannot be opened until these fields are defined. After you click OK to close the window, you would open the FMEA Design file and select the key fields and fault equivalence data fields.
If you later select the checkbox for an additional key field, that field is added to the FMEA Fault Equivalence file. If you clear the checkbox for a key field, when you open the FMEA Fault Equivalence file, a window opens, indicating that the key fields in this file differ from those in the FMEA Design file. Both the original key fields and current key fields are shown.
If you want to clear the original key fields from the FMEA Fault Equivalence file, you click OK. If you want to open this file without clearing the original key fields from it, you click Cancel. After you reset the key fields in the FMEA Design file to those that were originally selected, you can open the FMEA Fault Equivalence file.
If the selected FMEA data structure supports multiple causes and effects per mode, key fields can include fields from either the cause level or effect level. However, key fields cannot include fields from both the cause level and effect level. If you try to select an invalid field, a window opens, indicating why the field cannot be selected. If you selected key fields before selecting this particular data structure, any invalid key fields are removed from the FMEA Design file. If you build a FMEA Fault Equivalence file from a System file, a check is performed to ensure that it contains no invalid key field selections.