Perform Core Warehouse Work Processes Even Without Network
Wireless networks are great, no doubt about it, but wireless technology are not always stable and available, which can cause problems. They are affected by things like other networks nearby, or if you store certain items in your warehouse that will block the wireless signal.
The point is that the wireless network can be affected by things that are out of your control. As a result of this, getting 100% and stable network coverage in your entire area of usage can be very difficult. It is much easier, and much less expensive, to get to 90%, or simply focus on getting the network perfect in smaller areas.