Multi-variable operations

A method for operating a controllable multi-variable process, wherein a multi-dimensional display representation of the variables according to individual coordinate axes is derived, sets of values of process- and quality-variables accumulated respectively from previous multiple operations of the process are stored, first and second operational envelopes for the process- and quality-variables are calculated, the first and second envelopes being related respectively to bounds for the process- and quality-variables of the process and being derived from the accumulated sets of values to the extent that the first envelope is derived from a selected, limited group of the sets and the second envelope is derived from a larger group that includes said limited group, indicating current values of the process- and quality-variables on their respective axes detecting the condition in which any of the current values of the process-variables lie outside the first envelope, and including representation in the display representation of the first or the second operational envelope at least insofar as it relates to the quality-variables, in dependence upon whether or not, respectively, said condition is detected.

A method for operating a controllable multi-variable process, wherein a multi-dimensional display representation of the variables according to individual coordinate axes is derived, sets of values of process- and quality-variables accumulated respectively from previous multiple operations of the process are stored, and current values of the process- and quality-variables are indicated on their respective axes in relation to an operational envelope defining bounds for the process- and quality variables, the envelope being calculated from one or another of different parts of a selected group of the accumulated sets of values according to the current value of at least one of the process-variables, the part of the group from which the envelope is calculated comprising sets of the group which, in distinction to the sets of the other part or parts, have values for said one process-variable clustered on the current value thereof.

A system for operating a controllable multi-variable process, wherein a multi-dimensional display representation of the variables according to individual coordinate axes is derived, sets of values of process- and quality-variables accumulated respectively from previous multiple operations of the process are stored, and current values of the process- and quality-variables are indicated on their respective axes in relation selectively to one or other of a plurality of operational envelopes which are each derived from at least some of the accumulated sets of values and which define bounds for the variables and differ from one another in the bounds defined for at least one of the variables, the particular one of the envelopes in relation to which the current values are indicated being dependent on the current value of at least one of the process-variables.

A system for operating a controllable multi-variable process, wherein a multi-dimensional display representation of the variables according to individual coordinate axes is derived, sets of values of process- and quality-variables accumulated respectively from previous multiple operations of the process are stored, first and second operational envelopes for the process- and quality-variables are calculated, the first and second envelopes being related respectively to bounds for the process- and quality-variables of the process and being derived from the accumulated sets of values to the extent that the first envelope is derived from a selected, limited group of the sets and the second envelope is derived from a larger group that includes said limited group, indicating current values of the process- and quality-variables on their respective axes, detecting the condition in which any of the current values of the process-variables lie outside the first envelope, and including representation in the display representation of the first or the second operational envelope at least insofar as it relates to the quality-variables, in dependence upon whether or not, respectively, said condition is detected.

A system for operating a controllable multi-variable process, wherein a multi-dimensional display representation of the variables according to individual coordinate axes is derived, sets of values of process- and quality-variables accumulated respectively from previous multiple operations of the process are stored, and current values of the process- and quality-variables are indicated on their respective axes in relation to an operational envelope defining bounds for the process- and quality variables, the envelope being calculated from one or another of different parts of a selected group of the accumulated sets of values according to the current value of at least one of the process-variables, the part of the group from which the envelope is calculated comprising sets of the group which, in distinction to the sets of the other part or parts, have values for said one process-variable clustered on the current value thereof.