Methods and apparatus to define stages for multi-variate batch control analytics

An apparatus comprising:

• a batch stage analyzer, implemented via a processor, to determine a current stage in a current batch process based on a current value of a batch stage parameter, the current value of the batch stage parameter determined based on process control data associated with process parameters in the current batch process, the current stage determined independent of batch events, the batch events defined by at least one of a start or an end of procedures, unit procedures, operations, or phases in a batch recipe;
• and
• a batch model analyzer, implemented via the processor, to analyze the process control data relative to a first model during the current stage, the first model corresponding to the current stage, the batch model analyzer to analyze the process control data relative to a different model during a different stage other than the current stage when the batch stage parameter corresponds to a different value other than the current value, the different model corresponding to the different stage, wherein boundaries of the current stage and the different stage do not correspond to the batch events, execution of the current batch process controlled during the respective current and different stages based on the analysis of the process control data relative to the respective first and different models.