Hi Sarah,
You are already using RF devices, so why dont you think of going online instead of still depending on offiline. Recently we did a module implementation for one of our client and we initially thought of going for an offline procedure, but then finally we went for an online procedure as it eliminated lot of unnecessary work and time saving. Also we get an online picture of where the materials are at the moment. The main thing that we need to worry when going online is to ensure a robust connection to network.
Regards,
Vineeth