Methods and apparatus for monitoring operation of a system asset

A device for use in monitoring operation of a system asset, said device comprising:

• a display device;
• and
• a processor coupled to said display device, said processor configured to:
• display, on said display device, a first plot of a plurality of graphical plots of a first operation characteristic of the system asset as a function of a second operation characteristic in response to a user selection to display the first plot of the plurality of graphical plots;
• display, on said display device, a reference graphical plot of the first operation characteristic of the system asset as a function of the second operation characteristic overlying the first plot of the plurality of graphical plots;
• display, on said display device, a first representation of a difference between the first operation characteristic of the first plot and the reference graphical plot at a first selected value of the second operation characteristic in response to a user selection of the selected value of the second operation characteristic;
• and
• display, on said display device, a second representation of a difference between the first operation characteristic of a second plot of the plurality of graphical plots and the reference graphical plot at the first selected value of the second operation characteristic in response to a user selection of the second plot.

A method for use in monitoring operation of a system asset, said method comprising:

• displaying, on a display device, a first plot of a first operation characteristic of the system asset as a function of a second operation characteristic in response to a user selection to display the first plot;
• displaying, on the display device, a reference graphical plot of the first operation characteristic of the system asset as a function of the second operation characteristic overlying the first plot of the plurality of graphical plots;
• and
• maintaining the display of the reference graphical plot on the display device when the user selects a second plot of the plurality of graphical plots, the reference graphical plot displayed overlying the second plot.