Create an FMEA > Create variants of an FMEA structure
FMEA comparison difference types
After comparing the changes in the FMEA structures listed in the comparison result, you can align the FMEA structures.
The following table specifies the difference types listed in the result and their resolutions after alignment.
| Difference type | Description | Resolution after alignment |
|---|---|---|
| Structure modified | The structure of the source FMEA is modified. Therefore, the structure of the target FMEA is not the same as that of the source FMEA. For example, if you add or remove the existing system elements, functions and its related higher or lower functions, or failures and the related causes and effects of the source FMEA, the difference summary will show these changes as Structure modified. | The structure of the target FMEA is updated to align the target FMEA with the source FMEA. |
| Structure and property modified | The structure and properties of the source FMEA are modified. Therefore, the structure and properties of the target FMEA are not the same as that of the source FMEA. For example, if you add or remove the existing system elements, functions and its related higher or lower functions, or failures and the related causes and effects of the source FMEA, or update the name and description of the source FMEA, the difference summary shows these changes as Structure and property modified. | The structure and properties of the selected objects in the target FMEA are updated to align the target FMEA with the source FMEA. |
| Property modified | A property of the source FMEA is modified, so the properties of the target FMEA are not the same as that of the source FMEA. For example, if you modify the name and description of the source FMEA, the difference summary shows these changes as Property modified. | The modified properties of the target FMEA are copied from the source FMEA to align the target FMEA with the target FMEA. |
| Missing in Target | Objects that exist in the source FMEA are missing in the target FMEA. For example, if you delete objects in the target FMEA, or add new objects in the source FMEA, or while creating the variant you do not select some objects in the source FMEA, the difference summary shows such changes as Missing in target. | The objects missing in the target FMEA are created to align the target FMEA with the source FMEA. |
| Exist only in Target | Objects that exist in the target FMEA are missing in the source FMEA. For example, delete objects in the target FMEA, or add new objects in the source FMEA, the difference summary shows such changes as Exist only in Target. | The objects that exist only in the target FMEA are deleted to align the target FMEA with the source FMEA. |
Source: https://docs.sw.siemens.com/en-US/doc/282219420/PL20251212545240207.fmea/xid2049589 · retrieved 2026-07-11