Perform the structure analysis > Using the interface matrix to perform structure analysis of design FMEAs
Specify the interface type between the system elements in the interface
matrix
After you add the system elements to the FMEA structure, in the interface matrix, you can specify the interface type between two system elements. You can create multiple interface types between two system elements if required.
Procedure
Open the FMEA object.
Select the system element of the FMEA in the tree structure and click Interface Matrix.
In the Interface Matrix tab, in the table, select any cell that corresponds to the intersection of the row and column of the system element representations between which you want to specify the interface type.
The direction of the interaction is created from the selected row to the selected column.
- Click Create Interface .
In the Create Interface panel, verify the primary and secondary system elements.
- In Properties, select the required function type from the Interface Type list.
D - Data Exchange
E - Energy Transfer
I - Information Transfer
M - Material Exchange
P - Physical Connection
H - Human-Machine
- Specify the Interface Type Value.
You can specify the following values:
+2 - Indicates that the interaction is necessary for the functionality.
+1 - Indicates that the interaction is beneficial, but not necessary for the functionality.
0 - Indicates that the interaction does not affect the functionality.
-1 - Indicates that the interaction causes negative effects on the functionality but odes not prevent it
-2 - Indicates that the interaction must be prevented to achieve the required functionality.
In the Interface Details box, enter any additional information that you want to specify.
Specify the Connection Type as Direct or Indirect.
Specify the Interaction Direction as Two Way or One Way.
For one way interactions, the direction of the interaction is created from the selected row to the selected column.
- Click Create.
Source: https://docs.sw.siemens.com/en-US/doc/282219420/PL20251212545240207.fmea/xid2138739 · retrieved 2026-07-11