Then the data related to WorkRoll appears in the sensor data frame. We demonstrated this prototype system to people of the steel works. They told us the above techniques allowed them to understand the exact situation of the system. We propose new techniques for the synchronization and retrieval of recorded multimedia data for supervisory control systems, and test usability, and come to the following conclusions. The technique for synchronization enables users to see multiple recorded data simultaneously.
Users thereby analyze phenomena in the systems exactly.
The technique for retrieval enable users to see desired data at a desired time. Users can analyze phenomena in the systems quickly. A Tool For Real-Time Video Logging. 24-28, April 1994. 3-7, May 1992.