The Render Production command, available on the Render flyout on the main toolbar, renders the scene using the current production render settings without opening the Render Setup dialog.
Tip: To activate Production rendering mode without launching a rendering, use the Target drop-down list on the Render Setup dialog, or the drop-down list at the top-right corner of the Rendered Frame Window.
You assign which renderer to use for production rendering on the Render Setup dialog 
Renderers drop-down list.