Patent ID: 6879325

Claim:
A method for displaying process-variables of a multi-variable process, comprising the steps of accumulating a multiplicity of data-sets during multiple runs of the process, each data-set comprising values of the process-variables in an individual one of the multiple runs, deriving a multi-dimensional graphic display representation of a feasible region of the process-variables, the multi-dimensional graphic display representation being derived from the accumulated data-sets of values for the process-variables, deriving a further set of values for the process-variables within the region and displaying them graphically within the graphic display representation, and defining within the graphic display representation available ranges for the process-variables according to the values of other process-variables within the further set of values, the graphic display representation comprising a multiplicity of mutually-spaced coordinate axes which are identified individually in the graphic display representation with respective ones of the process-variables, and the feasible region being defined as an area of the graphic display representation between upper and lower boundaries extending through the coordinate axes, the upper and lower boundaries being derived in accordance with bounds of value that exist between the process-variables in the accumulated data-sets.