1. A computer-implemented method of managing data for at least one user comprising: sensing actual real-time processing plant operation status data for at least one asset from a set of assets of a processing plant through at least one sensor; recording, to a computer server, the actual real-time processing plant operation status data sensed from the at least one sensor; performing a simulation, through at least one simulation model from a set of simulation models of a planned process design specification, through a computer-implemented simulation engine; recording process design specification data from the simulation, through the computer-implemented simulation engine; correlating the actual real-time processing plant operation status data and the process design specification data through a computer-implemented correlation engine, into a set of correlated data; displaying the set of correlated data, to the at least one user through a computer display, such that the actual real-time processing plant operation status data and the process design specification data are streaming, and visually presented, concurrently, to the at least one user at the same time in a side-by-side manner; and displaying at least one set of further details of the set of correlated data, based upon interaction from the at least one user through a user interface, said displaying at least one set being by: (i) locating at least one plant identifier within the actual real-time processing plant operation status data, when presented with a search command by the at least one user, (ii) associating the at least one plant identifier to at least one simulation model variable of the at least one simulation model; and (iii) displaying the at least one plant identifier together with the at least one simulation model variable and together with the at least one set of further details of the set of correlated data, wherein based on user selection, and over a user-specified time range, the displayed at least one set of further details of the set of correlated data includes real-time data or live data and zero or more of the following: time-averaged data, historical averaged data, trend data, and historical performance trend data.