Data File Layout
The file layout used by PERFORM is a rectangular grid in which each column represents a Variable or measure.
There are multiple configurations that may be use for the layout of the data. Here are 5 alternative cases and the layout methods that may be used.
Case #1: Single Items or Measures per Sample, No Subgroups
The data is set up in a single column as follows.
Case #2: Multiple Items or Measures per Sample, No Subgroups
Each sample is set up on a single row. For three measure per sample, the layout would be as follows.
Case #3: Single Items or Measures per Sample, One Process Stream Variable
Two methods may be used in this case. The first creates a column for each Level of the Process Stream Variable. In other words, one column for each stream. This would be done as follows for three tool positions.
The second method is to create a grouping variable. The grouping variables provide a reference for each row to designate the process stream. With the same data as above, the layout would look like this.
Case #4: Single Items or Measures per Sample, Multiple Process Stream Variables
This situation requires the use of grouping variables. A column for each process stream variable must be created. For two process stream variables this would be done as follows.
Case #5: Multiple Items or Measures per Sample, Multiple Process Stream Variables
This requires a column for each process stream variable with the multiple measures found on the same row. This would be done as follows.