We do not provide a document which outlines a factory programming solution for WICED Smart. However, what I have seen other customers use is a series of command line tools we refer to internally as the 'Loader' tolset. These are the same tools we use for programming within the SDK environment, but they are also provided individually for factory programming requirements.
I believe these tools do require an NDA, so I cannot post them to the forum.
Here is a link to the Bluetooth Trace Tool that runs on Windows 7/8: Bluetooth Trace Tool
You may find this tool helpful as well.
I'll ask your local sales team to send you the Loader tools mentioned previously.