A plug valve has a valve body, a cage fitted within the valve body and a rotatable plug housed within a cylindrical cavity in the cage, for controlling fluid flow through the valve. The substreams are transmitted as signals from a transmit array of M antennas to be received by a receiver array at a receiver in the system, based on a set of transmission parameters. Thus, the data management method stores a low amount of image data in a limited storage space while minimizing loss of the image data, thereby effectively storing and managing data. The technique further includes forming, for each layer, a set of individual circuit board dimension parameters defining a set of individual circuit board dimensions for that layer based on the set of global circuit board dimension parameters.