Additional Windchill Capabilities > Service Information Management > About Windchill Service Parts > Creating and Editing Parts Lists > Updating Parts Lists after Changes to Source > Update Type for a Parts List During Update
  
Update Type for a Parts List During Update
A parts list will either be iterated or revised when it is updated after changes to its source SBOM.
The update process uses the value of these Service Information Management preferences to assess the update type required, based on the current lifecycle state of the parts list:
Lifecycle States to iterate a structure during regeneration
The default value for this preference is In Work.
Lifecycle States to revise a structure during regeneration
The default value for this preference is Released.
For more information, see Preferences for Regenerating a Service Structure.