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.
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Main Toolbar > (Render Production)
Tip: To activate Production rendering mode without launching a rendering, use the drop-down list in the bottom-left corner of the Render Setup dialog, or in the top-right corner of the Rendered Frame Window.
You assign which renderer to use for production rendering on the Assign Renderer rollout of the Render Setup dialog 
Common panel.