Configuring the Creo View Adapter for PDF > docworker Server Controlled Publishing
  
docworker Server Controlled Publishing
When the Visualization server initiates a request to convert documents to PDF format, the server uses the docworker to convert the file in the background. This Visualization server could be a Windchill server or another customized server environment.
The OFFICE (PDF) worker is an important link in achieving the full functionality of the Visualization server. For more information, refer to Visualization Server Definition.