Value Stream Mapping (VSM), one of the powerful visual tools utilized in Lean production, aims to provide a visual representation of material and information flows for a production system, all using a simple drawing. While you can use VSM to assess the production performance in real-time, using VSM requires an amount of time and manual labor that is often difficult for lean participants to maintain. This paper attempts to implement VSM in a lean environment by automating the collection and distribution of production data. This on-line RFID-based facility performance monitoring (ORFPM) system for manufacturing environments combines RFID technology and wireless internet to track movement of material and then provide the user with a real-time value stream map, even if they are not able to supervise the production flow in the facility. To ensure the ORFPM system operates well in the industrial environment, we tested it in two sets of laboratory layouts, one being a job shop and the other being a cellular layout. This paper discusses the development of the system and the results from the two laboratory implementations. The results indicate that the system is able to successfully transmit data via wireless Internet, develop a database for transportation time and lead time, and automatically generate a real-time VSM.