Clients are now enquiring for more shop floor work in progress (WIP) control to improve service levels and reduce time wasted looking for products ready for production. SFJ use radio frequency identification (RFID) in food factories to monitor and display the movement of WIP where the schedule time is critical to deliver products ready for despatch. This is a key part of the scheduling process where an accurate schedule can be followed because production can see the location of products through the RFID display screens in the department.