There is currently no easy way to see audit history of ServiceMax configuration changes. Modifying an SFM for example. This should be similar to the Salesforce Audit log.
Also our experience is that when a user modifies one thing in the org, which we think is using translation workbench, then all the last modified stamps get updated. This erases the little audit info of last modified that we do have.
Due to the way that ServiceMax manage SFM updates turning on field history tracking for the relevant ServiceMax configuration objects would not be enough for auditors.
This is the feedback from the Product team in a ServiceMax Knowledge article:
However, in regard to SFM changes, there is no OOTB UI to track changes to SFM settings.
ServiceMax uses record data to create the SFM transactions, mapping, filter criteria etc. You can use field history tracking on the ServiceMax Process and ServiceMax Config Data objects. However, when changes are made to a mapping or page layout within an SFM, the existing record data is deleted and new records are created.
It is technically possible to track SFM changes in the database, but would require technical expertise from SVMX to make sense of the underlying databases that track the SFM changes.